# Outline of bridges

The following outline is provided as an overview of and topical guide to bridges:
Bridges – a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle.

## What type of thing is a bridge?

Bridges can be described as all of the following:
* A structure – An arrangement and organization of interrelated elements in a material object or system, or the object or system so organized.
* A thoroughfare – A road connecting one location to another.

## Types of bridges

* Beam Bridge
* Truss Bridge
** Truss arch bridge
* Cantilever Bridge
* Stressed ribbon bridge
* Arch Bridge
** Tied Arch Bridge
** Through arch bridge
** Skew arch
* Suspension Bridge
** Cable-stayed bridge
* Simple suspension bridge
** Inca rope bridge
* Tubular bridge
* Extradosed bridge
* Moveable Bridge
** Drawbridge (British English definition) – the bridge deck is hinged on one end
** Bascule bridge – a drawbridge hinged on pins with a counterweight to facilitate raising ; road or rail
*** Rolling bascule bridge – an unhinged drawbridge lifted by the rolling of a large gear segment along a horizontal rack
** Folding bridge – a drawbridge with multiple sections that collapse together horizontally
** Curling bridge – a drawbridge with transverse divisions between multiple sections that curl vertically
** Fan Bridge - a drawbridge with longitudinal divisions between multiple bascule sections that rise to various angles of elevation, forming a fan arrangement.
** Vertical-lift bridge – the bridge deck is lifted by counterweighted cables mounted on towers ; road or rail
** Table bridge – a lift bridge with the lifting mechanism mounted underneath it
** Retractable bridge (Thrust bridge) – the bridge deck is retracted to one side
** Submersible bridge – also called a ducking bridge, the bridge deck is lowered into the water
** Tilt bridge – the bridge deck, which is curved and pivoted at each end, is lifted at an angle
** Swing bridge – the bridge deck rotates around a fixed point, usually at the centre, but may resemble a gate in its operation ; road or rail
** Transporter bridge – a structure high above carries a suspended, ferry-like structure
** Jet bridge – a passenger bridge to an airplane. One end is mobile with height, yaw, and tilt adjustments on the outboard end
** Guthrie rolling bridge
** Vlotbrug, a design of retractable floating bridge in the Netherlands
** Locks are implicitly bridges as well allowing ship traffic to flow when open and at least foot traffic on top when closed
* Rigid-frame bridge
* Side-spar cable-stayed bridge
* Segmental bridge
* Multi-Level Bridges
* Viaduct
* Vierendeel bridge
* Toll bridge
* Footbridge
** Clapper bridge
** Moon bridge
** Step-stone bridge
** Zig-zag bridge
** Plank
** Boardwalk
** Joist
* Multi-way bridge
** Three-Way Bridge
** Four-Way Bridge
** Five-Way Bridge
* Trestle bridge
** Coal trestle
* Transporter bridge
* Log bridge
* Packhorse bridge
* Aqueduct

### Military Bridges

* AM 50
* Armoured vehicle-launched bridge
* Bailey bridge
* Callender-Hamilton bridge
* Mabey Logistic Support Bridge
* Medium Girder Bridge
* Pontoon bridge

## History of bridges

History of bridges

## General bridges concepts

* Bending The behavior of a slender structural element subjected to an external load applied perpendicularly to a longitudinal axis of the element.
* Compression (physics) The application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.
* Shear stress The component of stress coplanar with a material cross section.
* Span (engineering) The distance between two intermediate supports for a structure.
* Tension (physics) The pulling force transmitted axially by the means of a string, cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at each end of said elements.
* Torsion (mechanics) The twisting of an object due to an applied torque.
** Torque The rate of change of angular momentum of an object.

## Bridges companies

* Alabama Department of Transportation (ALDOT)
* Alaska Department of Transportation and Public Facilities (DOT&PF)
* Arizona Department of Transportation (ADOT)
* Arkansas State Highway and Transportation Department (AHTD)
* California Department of Transportation (Caltrans)
* Colorado Department of Transportation (CDOT)
* Connecticut Department of Transportation (CONNDOT)
* Delaware Department of Transportation (DelDOT)
* Florida Department of Transportation (FDOT)
* Georgia Department of Transportation (GDOT)
* Hawaii Department of Transportation (HDOT)
* Idaho Transportation Department (ITD)
* Illinois Department of Transportation (IDOT)
* Indiana Department of Transportation (INDOT)
* Iowa Department of Transportation (Iowa DOT)
* Kansas Department of Transportation (KDOT)
* Kentucky Transportation Cabinet (KYTC)
* Louisiana Department of Transportation and Development (DOTD)
* Maine Department of Transportation (MaineDOT)
* Maryland Department of Transportation (MDOT)
* Massachusetts Department of Transportation (MassDOT)
* Michigan Department of Transportation (MDOT)
* Minnesota Department of Transportation (Mn/DOT)
* Mississippi Department of Transportation (MDOT)
* Missouri Department of Transportation (MoDOT)
* Montana Department of Transportation (MDT)
* Nebraska Department of Transportation (NDOT)
* Nevada Department of Transportation (NDOT)
* New Hampshire Department of Transportation (NHDOT)
* New Jersey Department of Transportation (NJDOT)
* New Mexico Department of Transportation (NMDOT)
* New York
** New York State Bridge Authority
** New York State Department of Transportation (NYSDOT)
** New York State Thruway Authority (NYSTA)
* North Carolina Department of Transportation (NCDOT)
* North Dakota Department of Transportation (NDDOT)
* Ohio Department of Transportation (ODOT)
* Oklahoma Department of Transportation (ODOT)
* Oregon Department of Transportation (ODOT)
* Pennsylvania Department of Transportation (PennDOT)
* Puerto Rico Department of Transportation and Public Works (DTOP)
* Rhode Island Department of Transportation (RIDOT)
* South Carolina Department of Transportation (SCDOT)
* South Dakota Department of Transportation (SDDOT)
* Tennessee Department of Transportation (TDOT)
* Texas Department of Transportation (TxDOT)
* Utah Department of Transportation (UDOT)
* Vermont Agency of Transportation (VTrans)
* Virginia Department of Transportation (VDOT)
* Washington State Department of Transportation (WSDOT)
* West Virginia Department of Transportation (WVDOT)
* Wisconsin Department of Transportation (WisDOT)
* Wyoming Department of Transportation (WYDOT)

## Notable bridges

* Akashi Kaikyō Bridge
* Alcantara Bridge
* Brooklyn Bridge
* Chapel Bridge
* Charles Bridge
* Chengyang Bridge
* Chesapeake Bay Bridge
* Gateshead Millennium Bridge
* George Washington Bridge
* Golden Gate Bridge
* Great Belt Bridge
* Hangzhou Bay Bridge
* Mackinac Bridge
* Millau Viaduct
* Ponte Vecchio
* Rainbow Bridge (Niagara Falls)
* Rialto Bridge
* Royal Gorge Bridge
* Seri Wawasan Bridge
* Seven Mile Bridge
* Stari Most
* Sunshine Skyway Bridge
* Sydney Harbour Bridge
* Tacoma Narrows Bridges
* The Confederation Bridge
* The Helix Bridge
* Tower Bridge
* Verrazano-Narrows Bridge
* Tsing Ma Bridge