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See three-way junction 5-1-1 A transportation and traffic information telephone hotline in some regions of the United States and Canada that was initially designated for road weather information. A Access road See frontage road Advisory speed limit A speed recommendation by a governing body. All-way stop or four-way stop An intersection system where traffic approaching it from all directions ...
The lower layer improved on Roman practice in that it was based on the understanding that the purpose of this layer (the sub-base or base course) is to transfer the weight of the road and its traffic to the ground, while protecting the ground from deformation by spreading the weight evenly. Therefore, the sub-base did not have to be a self ...
De-icing chemicals and sand can run off into roadsides, contaminate groundwater and pollute surface waters; [76] and road salts can be toxic to sensitive plants and animals. [77] Sand applied to icy roads can be ground up by traffic into fine particulates and contribute to air pollution. Roads are a chief source of noise pollution.
The main disadvantage of a road verge is that the right-of-way must be wider, increasing the cost of the road. In some localities, a wider verge offers opportunity for later road widening, should the traffic usage of a road demand this. For this reason, footpaths are usually sited a significant distance from the curb. [citation needed]
Cross traffic Divided Notes 2+1 road: Ireland High No Yes 2+1 road: North America High No Optional 2+1 road: Sweden Junction (roundabout) High No Yes 2+2 road: High No Yes Type of dual carriageway Alley: Uncontrolled Low Yes No Arterial road: High No Optional Autobahn: Germany Interchange High No Yes Autocesta: Interchange High No Yes Autopista ...
It occurs primarily in dogs and horses, but can also affect humans. In dogs it affects the gastrointestinal system and lymph nodes, and rarely the skin. [24] Mucormycosis is a collection of fungal and mold diseases in dogs including pythiosis, zygomycosis, and lagenidiosis that affect the gastrointestinal tract and skin. [6]
These HOV lanes, or roadways open to all traffic, can be reversible lanes, providing more capacity in the direction of heavy traffic, and reversing direction before traffic switches. Sometimes a collector/distributor road , a shorter version of a local lane, shifts weaving between closely spaced interchanges to a separate roadway or altogether ...
Washboarding effect on a road. Washboarding or corrugation [1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads.Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3]