Search results
Results from the WOW.Com Content Network
The speed-density relationship is linear with a negative slope; therefore, as the density increases the speed of the roadway decreases. The line crosses the speed axis, y, at the free flow speed, and the line crosses the density axis, x, at the jam density. Here the speed approaches free flow speed as the density approaches zero.
Key traffic stream variables include speed, flow, and density, which are interconnected. Free-flowing traffic is characterized by fewer than 12 vehicles per mile per lane, whereas higher densities can lead to unstable conditions and persistent stop-and-go traffic.
Level of service (LOS) is a qualitative measure used to relate the quality of motor vehicle traffic service. LOS is used to analyze roadways and intersections by categorizing traffic flow and assigning quality levels of traffic based on performance measure like vehicle speed, density, congestion, etc.
This is a list of countries (or regions) by total road network size, both paved and unpaved.Also included is additional data on the length of each country or region's controlled-access highway network (also known as a motorway, expressway, freeway, etc.), designed for high vehicular traffic.
Map of Moroccan highways and expressways. The motorways and expressways of Morocco are a network of multiple-lane, high-speed, controlled-access highways. As of November 2016 the total length of Morocco's motorways was 1,808 km (1,123 mi) and 1,093 km (679 mi) expressways. Morocco plans to expand the road network.
An arterial road or arterial thoroughfare is a road without controlled access that can carry a large volume of local traffic at a generally high speed, being below controlled-access highways in the hierarchy. Because their primary function is to connect collector roads (below) to controlled-access highways, some are considered limited-access roads.
Belgium has the second-highest density highway network in Europe after the Netherlands, at 54.7 km (34.0 mi) per 1,000 km 2 (390 sq mi). Belgium is situated at a crossroads of several countries, and its highways are used by many nationalities.
Braess's paradox is the observation that adding one or more roads to a road network can slow down overall traffic flow through it. The paradox was first discovered by Arthur Pigou in 1920, [1] and later named after the German mathematician Dietrich Braess in 1968.