Patent Publication Number: US-2022229259-A1

Title: Roadway access hole cutter and method of cutting a square or rectangular roadway access hole

Description:
FIELD OF THE INVENTION 
     The invention generally relates to a roadway access hole cutter that reduces the chance of rupturing a utility buried close to the roadway and a method of cutting a square or rectangular access hole in a roadway that avoids rupturing the buried utility. 
     BACKGROUND OF THE INVENTION 
     During installation of the optical fiber, a microtrench is cut in a roadway, the optical fiber and/or innerduct/microduct is laid in the microtrench and then a fill and sealant are applied over the optical fiber and/or innerduct/microduct to protect them from the environment. Methods of microtenching that can be utilized in the present invention include the methods described in my previous U.S. Pat. Nos. 10,641,414; 10,571,047; 10,571,045; 10,781,942; 10,808,379; 10,808,377 and U.S. patent publication Nos. 20180292027; 20180156357, and 20180106015, the complete disclosures of which are incorporated in their entirety herein by reference. 
     Before cutting a microtrench in a roadway, the city must be notified. The city personnel will locate and mark buried utilities on the roadway. When a microtrench must cross a buried utility, the buried utility must first be exposed, which requires cutting an access hole through the roadway and then removing the dirt below the roadway through the roadway access hole. Currently, core saws, concrete saws, core drills and jack hammers are used to break through the roadway. 
     The city roadways are asphalt and/or concrete. Utilities, such as natural gas, water, telecommunications, and/or electric, are typically buried in the dirt or bedding below the roadway. Natural gas lines are usually required to have 12-36 inches of cover above them. For example, a 2 inch natural gas line would have to be buried 14 inches below the roadway in order to have 12 inches of cover (dirt or bedding) above the natural gas line. 
     However, often times codes are not followed by installers and natural gas lines can be installed just below the roadway. A jackhammer is usually used to form the access hole in the roadway. However, if the buried utility, such a natural gas line is not buried according to code and is just below the roadway, the jackhammer can cause the natural gas line to rupture causing a fire and serious injury or death. Furthermore, conventional core saws, concrete saws, and core drills can also damage the shallowly buried utility. There is a great need for a softer way of cutting an access hole that reduces the chances of rupturing a buried utility that is not to code, i.e. just below the roadway. 
     Even with marking of the buried utilities, crews are still damaging buried utilities at an alarming rate. There is a great need for an automated safety device to reduce damaging buried utilities. 
     SUMMARY OF THE INVENTION 
     An objective of the invention is to provide an improved roadway access hole drilling device and a safer method of microtrenching to avoid unintentionally cutting buried utilities. 
     The present invention utilizes a roadway access hole saw comprising a four saws and associated saw drives to rotate the saws, to provide a square or rectangular access hole in a roadway above the buried utility. The novel use of the roadway access hole saw provides a far faster and safer method to expose the buried utility, especially when the utility is not buried to code and is just below the roadway. 
     The objectives of the invention and other objectives can be obtained by a method of installing optical fiber, innerduct or microduct under a roadway comprising:
         drilling a square or rectangular access hole in a roadway above a buried utility using a roadway access four saw head comprising a first saw opposing a second saw and a third saw opposing a fourth saw;   removing dirt below the roadway through the access hole to expose the buried utility;   cutting a microtrench in the roadway using a microtrencher so that the microtrench crosses the buried utility and does not damage the buried utility;   laying the optical fiber, innerduct or microduct in the microtrench; and   filling the microtrench with a fill material to cover and protect the optical fiber, innerduct or microduct.       

     The objectives can also be obtained by a roadway access drill configured to reduce damage to a utility buried under a roadway comprising:
         a four saw head comprising a first saw opposing a second saw and a third saw opposing a fourth saw, wherein the four saw head is configured to cut a square or rectangular roadway access hole;   at least one motor configured to drive the first, second, third and fourth saws; and a lifting device for lifting and lowering the roadway access drill.       

    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  A illustrates a roadway access hole drill located over the roadway above a buried utility. 
         FIG. 1B  illustrates a roadway access hole drill located over the roadway above a buried utility. 
         FIG. 1C  illustrates a roadway access hole saw located over the roadway above a buried utility. 
         FIG. 2  illustrates hole in the roadway cut by the roadway access hole drill to expose the buried utility. 
         FIG. 3  illustrates a microtrencher cutting a microtrench in the roadway that crosses the exposed previously buried utility. 
         FIG. 4A  illustrates an optical fiber sealed in the microtrench by a fill. 
         FIG. 4B  illustrates a buried utility sealed in the microtrench by a fill. 
         FIG. 5A  illustrates a view of a saw. 
         FIG. 5B  illustrates a view of a saw. 
         FIG. 5C  illustrates a view of a saw head comprising four saws cutting a square or rectangular access hole in a roadway. 
         FIG. 5D  illustrates a view of a saw head comprising four saws cutting a square or rectangular access hole in a roadway. 
         FIG. 5E  illustrates a saw movably mounted to the four saw head. 
         FIG. 5F  illustrates a saw rotatably mounted to the four saw head. 
         FIG. 5G  illustrates a saw moving along a cutting plane in the square or rectangular access hole  3  being cut. 
         FIG. 6A  illustrates a flow chart of a method of cutting a square or rectangular roadway access hole. 
         FIG. 6B  illustrates a flow chart of a method of cutting a square or rectangular roadway access hole. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The invention will be explained by reference to the attached non-limiting Figs. In the description, for purposes of explanation and not limitation, specific details are set forth, such as particular networks, communication systems, computers, terminals, devices, components, techniques, storage devices, data and network protocols, software products and systems, operating systems, development interfaces, hardware, etc. in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention can be practiced in other embodiments that depart from these specific details. Detailed descriptions of well-known networks, computers, digital devices, storage devices, components, techniques, data and network protocols, software products and systems, development interfaces, operating systems, and hardware are omitted so as not to obscure the description of the present invention. All use of the word “example” are intended to describe non-limiting examples of the invention. 
     The operations described in the figures and herein can be implemented as executable code stored on a computer or machine readable non-transitory tangible storage medium (e.g., floppy disk, hard disk, ROM, EEPROM, nonvolatile RAM, CD-ROM, etc.) that are completed based on execution of the code by a processor circuit implemented using one or more integrated circuits; the operations described herein also can be implemented as executable logic that is encoded in one or more non-transitory tangible media for execution (e.g., programmable logic arrays or devices, field programmable gate arrays, programmable array logic, application specific integrated circuits, etc.). 
     To facilitate an understanding of the principles and features of the various embodiments of the present invention, various illustrative embodiments are explained below. Although example embodiments of the present invention are explained in detail, it is to be understood that other embodiments are contemplated. Accordingly, it is not intended that the present invention is limited in its scope to the details of construction and arrangement of components set forth in the following description or examples. The present invention is capable of other embodiments and of being practiced or carried out in various ways. 
     As used in the specification and the appended claims, the singular forms “a,” “an” and “the” include plural references unless the context clearly dictates otherwise. For example, reference to a component is intended also to include composition of a plurality of components. References to a composition containing “a” constituent is intended to include other constituents in addition to the one named. 
     Also, in describing the example embodiments, terminology will be resorted to for the sake of clarity. It is intended that each term contemplates its broadest meaning as understood by those skilled in the art and includes all technical equivalents that operate in a similar manner to accomplish a similar purpose. 
     It is also to be understood that the mention of one or more method steps does not preclude the presence of additional method steps or intervening method steps between those steps expressly identified. Similarly, it is also to be understood that the mention of one or more components in a composition does not preclude the presence of additional components than those expressly identified. Such other components or steps not described herein can include, but are not limited to, for example, similar components or steps that are developed after development of the disclosed technology. 
     As illustrated, lines or arrows between elements can denote communications between the different elements. These communications can take any form known by those of skill in the art, including digital, telephonic, or paper. The communications can be through a WAN, LAN, analog phone line, etc. The information communicated can be in any format appropriate for the transmission medium. 
     “Data storage” can be non-transitory tangible memory, such as any one or a combination of a hard drive, random access memory, flash memory, read-only memory and a memory cache, among other possibilities. The data storage can include a database, implemented as relational database tables or structured XML documents or any other format. Such a database can be used to store the information gathered from transaction records and Thing Records. Non-volatile memory is preferred. 
     “Processor” can refer to a single data processor on a single computing device or a collection of data processors. The collection of data processors can reside on a single computing device or be spread across multiple computing devices. The processor can execute computer program code stored in the data storage or a memory. In one example, the processor can execute computer program code representative of functionalities of various components of the system. 
     While certain implementations of the disclosed technology have been described in connection with what is presently considered to be the most practical and various implementations, it is to be understood that the disclosed technology is not to be limited to the disclosed implementations, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. 
     Certain implementations of the disclosed technology are described above with reference to block and flow diagrams of systems and methods and/or computer program products according to example implementations of the disclosed technology. It will be understood that one or more blocks of the block diagrams and flow diagrams, and combinations of blocks in the block diagrams and flow diagrams, respectively, can be implemented by computer-executable program instructions. Likewise, some blocks of the block diagrams and flow diagrams do not have to be performed in the order presented or if at all, according to some implementations of the disclosed technology. 
     Computer program instructions can also be stored in a non-transient computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means that implement one or more functions specified in the flow diagram block or blocks. 
       FIGS. 1A and 1B  describe an example of a system for cutting a roadway access hole. 
     The system comprises user interface devices  120 , a server  150 , and computer system  702 , all interconnected via a communication network  140 . All interconnections can be direct, indirect, wireless and/or wired as desired. 
     The network  140  can be any desired network including the internet or telephone network. Various networks  800  can be implemented in accordance with embodiments of the invention, including a wired or wireless local area network (LAN) and a wide area network (WAN), wireless personal area network (PAN) and other types of networks that comprise or are connected to the Internet. When used in a LAN networking environment, computers can be connected to the LAN through a network interface or adapter. When used in a WAN networking environment, computers typically include a modem, router, switch, or other communication mechanism. Modems can be internal or external, and can be connected to the system bus via the user-input interface, or other appropriate mechanism. Computers can be connected over the Internet, an Intranet, Extranet, Ethernet, or any other system that provides communications, such as by the network. Some suitable communications protocols can include TCP/IP, UDP, OSI, Ethernet, WAP, IEEE 802.11, Bluetooth, Zigbee, IrDa, WebRTC, or any other desired protocol. Furthermore, components of the system can communicate through a combination of wired or wireless paths, including the telephone networks. 
     The systems can be accessed via any user interface device  120  that is capable of connecting to the server  150  via the network  140 . A plurality of user interface devices  120  can be connected to the server  150 . An example user interface device  120  contains a web browser and display. This includes user interface devices  120  such as internet connected televisions and projectors, tablets, iPads, Mac OS computers, Windows computers, e-readers, and mobile user devices such as the smartphones, iPhone, Android, and Windows Phone, and other communication devices. The user interface device  120  preferably is a smartphone. The smartphone  120  can be in any form, such as a hand held device, wristband, or part of another device, such as vehicle. 
     The computer processing unit (CPU) of the user interface device  120  can be implemented as a conventional microprocessor, application specific integrated circuit (ASIC), digital signal processor (DSP), programmable gate array (PGA), or the like. The CPU executes the instructions that are stored in order to process data. The set of instructions can include various instructions that perform a particular task or tasks, such as those shown in the appended flowchart. Such a set of instructions for performing a particular task can be characterized as a program, software program, software, engine, module, component, mechanism, or tool. The non-transitory memory can include random access memory (RAM), ready-only memory (ROM), programmable memory, flash memory, and the like. The memory, include application programs, OS, application data etc. 
     The server  150  and/or computer system  702  described herein can include one or more computer systems directly connected to one another and/or connected over the network  140 . Each computer system can include a processor, non-transitory memory, user input and user output mechanisms, a network interface, and executable program code (software) comprising computer executable instructions stored in non-transitory tangible memory that executes to control the operation of the server  150  and/or computer system  702 . Similarly, the processors functional components formed of one or more modules of program code executing on one or more computers. Various commercially available computer systems and operating system software can be used to implement the hardware and software. The components of each server can be co-located or distributed. In addition, all or portions of the same software and/or hardware can be used to implement two or more of the functional servers (or processors) shown. The server  150  and/or computer system  702  can run any desired operating system, such as Windows, Mac OS X, Solaris or any other server based operating systems. Other embodiments can include different functional components. In addition, the present invention is not limited to a particular environment or server  150  and/or computer system  702  configuration. Preferably, the server  150  is a cloud based computer system. If desired for the particular application, the server  150  or portions of the server  150  can be incorporated within one or more of the other devices of the system, including but not limited to a user interface device  120 . 
     The server  150  includes at least one web server and the query processing unit. The web server receives the user query and sends the user query to the query processing unit. The query processing unit processes the user query and responds back to the user interface device  150  and/or computer system  702  via the web server. The query processing unit fetches data from the database server if additional information is needed for processing the user query. The database is stored in a non-transitory tangible memory, and preferably a non-volatile memory. The term “database” includes a single database and a plurality of separate databases. The server  150  can comprise the non-volatile memory or the server  150  can be in communication with the non-volatile memory storing the database. The database can be stored at different locations. 
     Software program modules and data stored in the non-transitory memory the server  150  and/or non-volatile memory of the user interface device  150  and/or computer system  702  can be arranged in logical collections of related information on a plurality of computer systems having associated non-volatile memories. The software and data can be stored using any data structures known in the art including files, arrays, linked lists, relational database tables and the like. The server  150 , computer system  702  and mobile user device  150  can be programmed to perform the processes described herein. 
     Saw head utility avoidance safety device. 
     Modern cities require an extensive range of utilities to function. The buried utilities include at least water, electricity, gas, telephone, and fiber optics. These utilities are typically provided through underground conduits. In theory, the location of the utilities is carefully recorded and held centrally by city authorities. In practice this does not universally occur and the location of many utilities can be unrecorded or recorded incorrectly. The determined location of the utility may be acquired by underground imaging, which is commonly accomplished by the use of ground penetrating radar (GPR). Typically, the location of buried utilities are separately determined by GPR and the location marked for later cutting or digging, 
     The present drill systems for installing optical fiber and/or innerduct microduct, or for installing a new utility, having a four saw head utility avoidance safety device greatly reduces the chances of damaging a buried utility caused by operator error, errors in four saw head location, errors in the buried utility location, and other errors. The utility avoidance safety device includes an under-roadway detection unit  700 , which can be a GPR, connected to the computer system  702  that controls forward movement of the four saw head  27  during drilling. The computer system  702  can further comprise a drill control system  716 . 
     A conventional GPR system comprises an electromagnetic detection unit, a computer system that receives detection data from the detection unit; a user interface device coupled to the computer system; and a display coupled to the computer system. The computer system interprets the detection data to provide a visual representation of the underground on the display. Computer systems are now well known and any suitable computer system comprising a processor in communication with non-volatile, non-transitory memory can be utilized. 
     U.S. patent publication No. 2003/0012411 (Sjostrom), discloses a system and method for displaying and collecting GPR data. U.S. Pat. No. 6,617,996 (Johansson), discloses a GPR system to provide an audible signal regarding size and how deep. My previous U.S. Pat. No. 10,571,047 discloses a GPR system for use in microtrenching. The complete disclosures of these patents and publications are incorporated herein by reference. Ditch Witch 2450R GPR is commercial example of a GPR machine that can detect at suitable speeds of 5.6 mph. Geophysical Survey Systems, Inc. also commercially sells suitable GPRs that can be utilized in the present invention. 
     In place of the usual GPR used to locate buried utilities, the invention can utilize other means of revealing buried utilizes or any tomography, including but not limited to, radio frequency identification, sound waves, electrons, hydraulic, vibration, magnetic, sonar, ultrasound, microwaves, xrays, gamma rays, neutrons, electrical resistivity tomography, Multi-channels Analysis of Surface Waves (MASW), and/or Frequency-domain Electra Magnetics (FDEM) induction. Any of these alternatives and later developed alternatives can be utilized. Thus, the under-roadway detection unit  700  can comprise GPR and/or any other alternative for detecting objects buried under the roadway. Preferably, the under-roadway detection unit  700  comprises a GPR. 
     As shown in  FIGS. 1A-4A , the claimed invention utilizes an under-roadway detection unit  700  in a novel utility avoidance device for use on a roadway access hole drilling device  22  to create an access hole  3  in a city street (also referred to as a roadway  2 ) to install an optical fiber or innerduct/microduct  5  under the roadway  2 .  FIG. 4B  shows a buried new utility  9  in place of the buried optical fiber or innerduct/microduct  5 . Examples of the new utility  9  include electrical devices, including but not limited to coax cable, copper cable, low voltage cable and power cable. 
     As shown in  FIG. 1A , the under-roadway detection unit  700  is configured to survey under the roadway  2  during drilling using the drilling device  22 . Roadway access drilling devices  22  are now well known and any suitable access hole drilling device can be utilized in the present invention. However, the present invention utilizes a novel four saw head  27  in place of a normal drill head. 
     The four saw head  27  comprises a first saw  53  opposing a second saw  54  and a third saw  55  opposing a fourth saw  56 . Preferably, each of the four saws  53 ,  54 ,  55 ,  56  can each have circular blade  36  driven by an individual motor  34  and a saw blade shroud  37  as shown in  FIGS. 5A-5C . The saw blade shroud  37  protects an exposed surface of the blade  36 . Each of the four saws  53 ,  54 ,  55 ,  56  cut an inside surface of the square or rectangular access hole  3 . 
     The four saw head  27  can cut a square or rectangular access hole  3  in a roadway  2 , such as asphalt or concrete. In a preferred embodiment, the first, second, third and fourth saws operate simultaneously to simultaneously cut the four sides of the square or rectangular access hole  3 . Examples of suitable sizes for a square access hole  3  are each of the four sides being from 4 inches×4 inches to 16 inches×16 inches and depths ranging from 1 inch to 16 inches. Examples of suitable sizes for a rectangular access hole  3  are sides being from 4 to 16 inches and depths ranging from 1 inch to 16 inches. 
     As shown in  FIGS. 5E, 5F, 5F  each of the four saw blades  36  can move along the axis to cut the corners  35 . If the saw blades  36  do not reach the corners  35 , the corners  35  can be busted out after cutting the access hole  3 . 
     Each of the four saws  53 ,  54 ,  55 ,  56  are preferably mounted in the four saw head  27  so that the positions of the saws  53 ,  54 ,  55 ,  56  does not change in relation to the four saw head  27 . The inner walls of the square or rectangular access hole  3  are thus the same size as the diameter of the saw blades  36 , as shown in  FIGS. 5C and 5D . If a saw breaks, it is easily replaceable. 
     Alternatively, the four saws  53 ,  54 ,  55 ,  56  can be mounted on associated saw movable mounts  45  as shown in  FIG. 5E  that allow the saw blade  36  to move along a cutting plane  47 , shown at  33 , that creates an inner wall of the square or rectangular roadway access hole  3 .  FIG. 5G  shows an example of how the saw  36  can move along a cutting plane  47 , shown at  33 , that creates an inner wall of the square or rectangular roadway access hole  3 . Cutting two adjacent inner walls of the square or rectangular roadway access hole  3  forms the corner  35 . In this manner, the inner walls of the square or rectangular access hole  3  can be made larger in size than the diameter of the saw blades  36 . 
     In another alternative, the four saws  53 ,  54 ,  55 ,  56  can be mounted on associated saw rotatable mounts  46  as shown in  FIG. 5E  that allow the saw blade  36  to move along a cutting plane  47 , shown at  33 , that creates an inner wall of the square or rectangular roadway access hole  3 .  FIG. 5G  shows an example of how the saw  36  can move along a cutting plane  47 , shown at  33 , that creates an inner wall of the square or rectangular roadway access hole  3 . Cutting two adjacent inner walls of the square or rectangular roadway access hole  3  forms the corner  35 . In this manner, the inner walls of the square or rectangular access hole  3  can be made larger in size than the diameter of the saw blades  36 . 
     The device  18  is designed for making a neat clean cutout (roadway access hole  3 ) to help locate utilities or install a small utility handhole for various utility services such as telecommunications. The device  18  can be driven with four individual motors  34 , each driving an associated saw blade  36 , or one motor  32  powering all four saw blades  36 . The four saw head  27  can have a water attachment  28  to keep the saw blades  36  cool while cutting or a pressurized air attachment  29  to provide air cooling to the saw blades  36 . A saw blade shroud  37  can cover an exposed part of the saw blade  36  for safety as well as having a vacuum attachment for collecting all dust and debris. 
     Detection data from the under-roadway detection unit  700  can be sent to a computer system  702 . The computer system  702  can send display information to the display  704  to display what is under the roadway  2  in the same manner as conventional GPR systems. The computer system  702  can also interpret the detection data in real time to identify objects under the roadway. For example, the computer system  702  can distinguish between utilities  4  under the roadway  2  and other objects under the roadway, such as reinforcing steel. The interpretation, i.e. a buried utility  4 , can also be displayed on the display  704  for the drill operator, or on a user interface device  120 . The computer system  702  determines the location of the identified utility  4 , or object, to be avoided, such as depth and/or size in real time as the four saw head  27  is cutting through the roadway  2 . The computer system  702  determines the distance between the four saw head  27  and the buried utility  4  in real time as the four saw head  27  is cutting through the roadway  2 , which is shown at  706 . A user interface device  120  can be coupled to the computer system  702  for the operator to control the under-roadway detection unit  700 . The computer system  702  can also determine the distance between the roadway  2  and the buried utility  4 , shown at  709 . 
     When the computer system  702  identifies a buried utility  4  in the path of the four saw head  27 , the computer system  702  can send an alert  714  to the drill and/or stop forward movement of the four saw head  27 . In this manner, there is added protection against undesirable cutting of buried utilities  4  by the four saw head  27 . 
     Drill control systems  716  for controlling forward movement and/or directional control of the four saw head  27  are now well known. The computer system  702  is connected to the drill control system  716  to override control of the four saw head  27  when necessary to avoid damaging a buried utility  4 . For example, forward movement of the four saw head  27  can be automatically stopped by the computer system  702  and/or drill control system  716  at a set distance  706 , such as from 2-24 inches, preferably 4-12 inches. 
     The under-roadway detection unit  700  can be connected to the computer system  702  by wireless and/or wired connection, and/or indirectly by a network  140 . Additional attachments can be connected to the computer system  702  as desired. Examples of additional attachments are shown in  FIG. 1A . The connections between the additional attachments can be wired and/or wireless directly and/or indirectly by the network  140 . Examples of additional attachments include user interface devices  120  and/or a server  150 . 
     The computer system  702  can comprise a global positioning device or other positioning device to map the location of the microtrench  12 , buried utilities  4  detected by the under-roadway detection unit  700 , and the buried optical fiber and/or innerduct/microduct  5 , or buried new utility  9 . 
     The computer system  702  can be connected to a network  140  for transmitting drilling data to the server  150  connected to the network  140  and/or user interface devices  120  connected to the network  140 . The drilling data can include, for example, the measurements of the access hole  3 , video of the hole  3 , location of the hole  3 , location of the buried utilities  4  detected by the under-roadway detection unit  700 , location of the buried optical fiber and/or innerduct/microduct, speed of microtrenching, and any other information as desired, in real time. The drilling data can also be stored on the computer system  702 , or by any other means, such as USB, flash drives, etc., for later uploading or accessing. 
     With the present method and system, as described in the flow diagrams of  FIGS. 6A and 6B , the location of buried utilities  4  can be accurately determined in real time, the access hole  3  drilled in a manner that avoids the four saw head  27  damaging the buried utilities  4 , a microtrench  12  cut, spoil vacuumed out of the microtrench  12 , the measurements of the microtrench  12  measured  720 ,  722 , the optical fiber and/or innerduct/microduct  5  or buried new utility  9  can be installed in the microtrench  12 , and the microtrench  12  filled with fill  7 , all conducted simultaneously and continuously at the rates disclosed herein above, which are far faster rates than previously. The drilling information can be uploaded in real time to a central database for use by the city, managers, traffic controllers, supervisors, and any others as desired. In this manner, the actual location of buried utilities can be more precisely mapped and stored in city records. 
     Any suitable microtrencher  14  can be utilized in the present invention. Non-limiting examples of suitable micro trenchers include those made and sold by Ditch Witch, Vermeer, and Marais. A Vermeer RTX 1250 tractor can be used as the motorized vehicle for the microtrencher  14 . A microtrencher  14  has is a “small rock wheel” specially designed for work in rural or urban areas. The microtrencher  14  is fitted with a microtrencher blade  15  that cuts a microtrench  12  with smaller dimensions than can be achieved with conventional trench digging equipment. Microtrench  12  widths usually range from about 6 mm to 130 mm (¼ to 5 inches) with a depth of 750 mm (about 30 inches) or less. Other widths and depths can be used as desired. 
     With a microtrencher  14 , the structure of the road, sidewalk, driveway, or path is maintained and there is no associated damage to the road. Owing to the reduced microtrench  12  size, the volume of waste material (spoil) excavated is also reduced. Microtrenchers  14  are used to minimize traffic or pedestrian disturbance during cable laying. The microtrencher  14  can work on sidewalks or in narrow streets of cities, and can cut harder ground than a chain trencher, including cutting through for example but not limited to solid stone, concrete, and asphalt. 
     A debris containment shroud  40  can be placed on the roadway  2  over the buried utility  4  to be exposed. The debris containment shroud  40  can be attached to a vacuum hose  48  attached to a source of vacuum  50 . The debris containment shroud  40  is configured to provide a vacuum to a hollow chamber  44  during use. During use, the debris containment shroud  40  rests on the roadway  2  surface and the debris, such as dust, chips, particles, etc., and water if present are vacuumed away through the vacuum hose  48  and into a vacuum storage container  52 . The vacuum hose  48  can be any size as desired, such as from 4 to 12 inches in diameter. Sources of vacuum  50  are now well known and any suitable vacuum source can be utilized, such as those made by SCAG Giant Vac., DR Power, Vermeer, and Billy Goat. 
     As shown in  FIGS. 2 and 3 , once the buried utility  4  is exposed, a microtrencher  14  is used to cut a microtrench  12  in the roadway so that the microtrench  12  crosses the buried utility  4  without damaging the buried utility  4 . As shown in  FIG. 4A , the optical fiber, innerduct, or microduct  5  can be laid in the microtrench  12 , and the a fill  7  can be applied to cover the hole  3  and fill the microtrench  12  to cover and protect the optical fiber, innerduct, or microduct  5 . As shown in  FIG. 4B , the new utility  9  can be laid in the microtrench  12 , and the fill  7  can be applied to cover the hole  3  and fill the microtrench  12  to cover and protect the new utility  9 . 
     EXAMPLE 
     On 19 Nov. 2020, one of my crews struck a buried gas line while installing optical fiber. The gas line The Gas line was mismarked by approximately twenty-one (21) inches and buried approximately six (6) inches deep. 911 and 811 were contacted. This type of accident happens far too often and the chances of this type of accident happening can be greatly reduced using the present invention. The following information is the ticket:
         811 Ticket #2082405236 (Nov. 19, 2020)   Dig Up Tkt #2082843411   When did it happen: 3:00 PM   Impact to residents: 2   Evacuation?: No   Main line: No   Service line: Yes   Scope of work: Microtrenching—2213 Rountree Dr.   Positive Locate: Mismarked   Reason for strike: Mismarked by 21″   Repair status: Gas has been contained ; TGS On Site   ConEx Ticket Number: 174074741       

     REFERENCE NUMBERS 
       2  Roadway 
       3  Square or rectangular access hole 
       4  Buried utility 
       5  Optical fiber, innerduct, microduct 
       6  Dirt 
       7  Fill 
       9  New utility 
       12  Microtrench 
       14  Microtrencher 
       15  Microtrencher blade 
       18  Drilling Device 
       22  Roadway access drilling device 
       27  Four saw head 
       28  Water attachment 
       29  Pressurized air attachment 
       30  Saw blade shroud 
       32  Motor 
       33  Movement of blade  36  along cutting plane  47   
       34  Individual motor 
       35  Corner of square or rectangular access hole 
       36  Saw blade 
       37  Saw blade shroud 
       40  Debris containment shroud 
       44  Hollow chamber 
       45  Saw movable mount 
       46  Saw rotatable mount 
       47  Cutting plane 
       48  Vacuum hose 
       50  Source of vacuum 
       52  Vacuum storage container 
       53  First saw 
       54  Second saw 
       55  Third saw 
       56  Fourth saw 
       120  User interface device 
       140  Network 
       150  Server 
       700  Under-Roadway Detection Unit 
       702  Computer System 
       704  Display 
       706  Distance between buried utility  4  and four saw head  27  during cutting 
       707  Distance between buried utility  4  and roadway  2   
       714  Alert to Drill Operator 
       716  Drill control system 
     It is to be understood that the foregoing illustrative embodiments have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the invention. Words used herein are words of description and illustration, rather than words of limitation. In addition, the advantages and objectives described herein may not be realized by each and every embodiment practicing the present invention. Further, although the invention has been described herein with reference to particular structure, steps and/or embodiments, the invention is not intended to be limited to the particulars disclosed herein. Rather, the invention extends to all functionally equivalent structures, processes and uses, such as are within the scope of the appended claims. Those skilled in the art, having the benefit of the teachings of this specification, may affect numerous modifications thereto and changes may be made without departing from the scope and spirit of the invention. While the invention has been described to provide an access hole over a buried utility, the invention can be utilized wherever an access hole in the roadway is required.