171 Number of lanes types 172 Interstate route number 173 U.S. route number 174 State route number 175 Reservation, park, or military route number 176 County route 177 XXYY Alphabetic portion of any route number. The RDS24 coverage is defined by use of major and minor pairs. DLG data delineations, ie. This data layer was started in 1990 and is continually being updated.
Scale is an important factor in data usage.
Certain scale datasets are not suitable for some project, analysis, or modelling purposes. Please be sure you are using the best available data. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analyses. Every effort has been made to supply the user with data documentation.