Road

A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation.

Public infrastructure
Grand Coulee Dam
Assets and facilities
Airports Bridges Broadband Canals Coastal management Critical infrastructure Dams Electricity Energy Hazardous waste Hospitals Irrigation schemes Levees Lighthouses Parks Pipeline transport Ports Mass transit Public housing State schools Public spaces Rail Roads Sewage treatment Sewerage Sluices Solid waste Telecommunication Utilities Water supply Weirs
Concepts
Asset management Appropriation Lindahl tax Build–operate–transfer Design–bid–build Design–build Earmark Fixed cost Engineering contracts Externality Government debt Life-cycle assessment Maintenance Monopoly Property tax Public–private partnership Public capital Public finance Public good Public sector Renovation Replacement (upgrade) Spillover Supply chain Taxation
Issues and ideas
Air traffic control Brownfield Carbon footprint Containerization Congestion pricing Ecotax Ethanol fuel Fuel tax Groundwater High-speed rail Hybrid vehicles Land-use planning Mobile data terminal Pork barrel Rapid bus transit Recycling Renewables Reverse osmosis Smart grid Smart growth Stormwater Urban sprawl Traffic congestion Transit-oriented development Fuel efficiency Waste-to-energy Weatherization Wireless technology
Fields of study
Architecture Chemical engineering Civil Electrical Mechanical engineering Public economics Public policy Urban planning
Examples Akashi Kaikyō Bridge Trans-Alaska pipeline Autobahn Brazilian energy independence Brooklyn Bridge Channel Tunnel Chicago wastewater China's high-speed rail Curtiba rapid bus transit Danish wind-power British offshore wind-power Nuclear power in France Solar power in Germany Hoover Dam Hong Kong Int'l Airport Intercity Express Interstate highways Jamnagar Refinery Kansai Int'l Airport Panama Canal Port of Shanghai San Francisco Bay Bridge Three Gorges Dam Shinkansen Spanish high-speed rail French TGV rail Spanish autovias and autopistas Transcontinental Railroad Power transmission in the USA
Category  Engineering portal
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There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, thoroughfares, and local roads.

The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths.