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Detour (road)
Encyclopedia
A detour or diversion route is a route around a planned area of prohibited or reduced access, such as a construction
site.
Standard operating procedure for many road departments is to route any detour over roads within the same jurisdiction as the road with the obstructed area.
On multi-lane highway
s (e.g. freeways, expressways, city streets, etc.), usually traffic shifts can be utilized in lieu of a detour as turn lanes can often be congested with detours.
.
uses yellow signs with a series of symbols for its diversion routes.
has a system of "special route" Emergency routes which parallel major highways.
has a permanent detour of Interstate 70
in place because of frequent flooding.
has a system of "color detour signs" in which any detour follows signs with a specific color. The detours are meant to be used if a limited-access highway has to be closed for an emergency situation such as a flood
or car accident
, directing motorists along local roads near the limited-access highway to the next exit. They are generally color-coded according to direction, with blue meaning north, red meaning south, green meaning east, and orange meaning west. However, other colors, such as black and brown, are sometimes used when detour routes overlap with one another.
Construction
In the fields of architecture and civil engineering, construction is a process that consists of the building or assembling of infrastructure. Far from being a single activity, large scale construction is a feat of human multitasking...
site.
Standard operating procedure for many road departments is to route any detour over roads within the same jurisdiction as the road with the obstructed area.
On multi-lane highway
Highway
A highway is any public road. In American English, the term is common and almost always designates major roads. In British English, the term designates any road open to the public. Any interconnected set of highways can be variously referred to as a "highway system", a "highway network", or a...
s (e.g. freeways, expressways, city streets, etc.), usually traffic shifts can be utilized in lieu of a detour as turn lanes can often be congested with detours.
Permanent detours
Various areas have systems of permanent detours as part of incident managementIncident management
Incident Management refers to the activities of an organization to identify, analyze and correct hazards. For instance, a fire in a factory would be a risk that realized, or an incident that happened...
.
United Kingdom
The United KingdomUnited Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
uses yellow signs with a series of symbols for its diversion routes.
Michigan
MichiganMichigan
Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....
has a system of "special route" Emergency routes which parallel major highways.
Ohio
OhioOhio
Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...
has a permanent detour of Interstate 70
Interstate 70 in Ohio
In the U.S. state of Ohio, Interstate 70 provides access between Indiana and West Virginia.-Route description:Along its path through Ohio, Interstate 70 passes through the following counties: Preble, Montgomery, Clark, Madison, Franklin, Fairfield, Licking, Muskingum, Guernsey and Belmont County...
in place because of frequent flooding.
Pennsylvania
PennsylvaniaPennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
has a system of "color detour signs" in which any detour follows signs with a specific color. The detours are meant to be used if a limited-access highway has to be closed for an emergency situation such as a flood
Flood
A flood is an overflow of an expanse of water that submerges land. The EU Floods directive defines a flood as a temporary covering by water of land not normally covered by water...
or car accident
Car accident
A traffic collision, also known as a traffic accident, motor vehicle collision, motor vehicle accident, car accident, automobile accident, Road Traffic Collision or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other stationary obstruction,...
, directing motorists along local roads near the limited-access highway to the next exit. They are generally color-coded according to direction, with blue meaning north, red meaning south, green meaning east, and orange meaning west. However, other colors, such as black and brown, are sometimes used when detour routes overlap with one another.