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•  Freeway

  A freeway is a type of road designed for safer high-speed operation of motor vehicles through the elimination of at-grade intersections. This is accomplished by preventing access to and from adjacent properties and eliminating all cross traffic through the use of grade separations and interchanges; railroad crossings are also removed. Such highways are usually divided with at least two lanes in each direction.

  

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•  Road

  A road is an identifiable route, way or path between places. Roads are typically smoothed, paved, or otherwise prepared to allow easy travel; though they need not be, and historically many roads were simply recognizable routes without any formal construction or maintenance. The term was also commonly used to refer to roadsteads, waterways that lent themselves to use by shipping.

  

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•  Traffic

  Traffic on roads may consist of pedestrians, ridden or herded animals, vehicles, streetcars and other conveyances, either singly or together, while using the public way for purposes of travel. Traffic laws are the laws which govern traffic and regulate vehicles, while rules of the road are both the laws and the informal rules that may have developed over time to facilitate the orderly and timely flow of traffic.

  

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•  Transport economics

  Transport economics is a branch of economics that deals with the allocation of resources within the transport sector and has strong linkages with civil engineering. Transport economics differs from some other branches of economics in that the assumption of a spaceless, instantaneous economy does not hold. People and goods flow over networks at certain speeds. Demands peak. Advanced ticket purchase is often induced by lower fares. The networks themselves may or may not be competitive.

  

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•  Interstate 80

  Interstate 80 (I-80) is the second-longest Interstate Highway in the United States. It connects downtown San Francisco, California, to Teaneck, New Jersey (Just outside of New York City). I-80 is the interstate that most closely approximates the route of the Lincoln Highway, the first auto trail to cross the country.

  

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