Siren
A siren is a sound signal that priority vehicles use to warn other road users that they have to pass.
Ave
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…
Roundabout
A roundabout is a kind of circular intersection in which the traffic continuously drives in one direction around a central island. The drivers a…
Roadmarks
Roadmarks are used on paved roadways to provide guidance and information to drivers and pedestrians. Uniformity of the markings is an important …
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…
