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A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, [ a ]motorway, [ b ] and expressway. [ c ] Other similar terms include throughway or thruway[ d ] and parkway.
The Veterans Memorial Parkway in London, Ontario is a modern at-grade limited-access road with intersections. A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, and partial controlled-access highway, is a highway or arterial road for high-speed traffic which has many or most characteristics of a controlled-access highway ...
The northernmost 4.6 miles (7.4 km) of the parkway is a four-lane limited-access highway, and the remainder is a controlled-access highway. [7] Running in a diagonal southeast–northwest alignment, the I-140 stretch is signed as an east–west route, and both SR 162 sections are signed as north–south.
Elevated highway. An elevated highway is a controlled-access highway that is raised above grade for its entire length. Elevation is usually constructed as viaducts, typically a long pier bridge. Technically, the entire highway is a single bridge. Yan'an Elevated Road in Shanghai, China.
A junction that connects a controlled-access facility to a lower-order facility, such as an arterial or collector road. [4] The mainline is the controlled-access highway in a service interchange, while the crossroad is the lower-order facility that often includes at-grade intersections or roundabouts, which may pass over or under the mainline. [5]
Stack interchange. A directional interchange, colloquially known as a stack interchange, is a type of grade-separated junction between two controlled-access highways that allows for free-flowing movement to and from all directions of traffic. These interchanges eliminate the problems of weaving, have the highest vehicle capacity, and vehicles ...
The Interstate highway system in the United States is the largest national controlled-access highway network in the world. Maximum speed limits in the U.S. states vary by state from 60 to 85 mph. Maximum speed limits in the U.S. territories vary by territory from 15 to 65 mph.
The Italian Autostrada dei Laghi ("Lakes Motorway"; now parts of the Autostrada A8 and the Autostrada A9), the first controlled-access highway ever built in the world, [42] [43] in 1925, the year following its inauguration. The first version of modern controlled-access highways evolved during the first half