Toll road
A toll road, also known as a turnpike or tollway or toll plaza, is a public or private road (almost always a controlled-access highway in the pr…
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Runaway truck ramp
A runaway truck ramp is a traffic device that enables vehicles which are having braking problems to safely stop. It is typically a long, sand- o…
Rockfall
Rockfall refers to quantities of rock falling freely from a cliff face. A rockfall is a fragment of rock detached by sliding or falling, that fa…
Road surface
A road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or…
Ring road
A ring road is a road or a series of connected roads encircling a town, city, or country. The most common purpose of a ring road is to assist in…
