Horizontal Displacement

Installing a curve or some other measure that requires drivers to stray from a straight roadway section lowers their speed in the process.

Treatment Options

Drivers go much faster on a straight section of roadway because the conditions are conducive to that speed, but installing a curve or some other measure requiring drivers to stray from that straight roadway section lowers their speed in the process.

Physical displacement treatments involve moving drivers from the straight path, which requires them to slow down or evaluate their speed in the process.

Various treatments involving horizontal physical displacement within rural communities and settings can include these treatments:

References

Andrle, Stephen J., Keith K. Knapp, Tom McDonald, and Duane E. Smith. Iowa Traffic Control Devices and Pavement Markings: A Manual for Cities and Counties. Center for Transportation Research and Education, Iowa State University, 2001.

City of Winston-Salem, North Carolina. "Traffic Calming Policy. Section IV." Traffic Calming Measures, 2003.

FHWA. Roundabouts: A Safer Choice. Federal Highway Administration, n.d.

MnDOT. Traffic Engineering Manual. Minnesota Department of Transportation, St. Paul, MN,1999.

Image: Aerial view of bulb-outs at four-way intersection

Aerial view of bulb-outs (City of Winston-Salem, North Carolina 2003)

Illustrartion: Aerial view of a chicane

Aerial view of a chicane (Andrle et al. 2001)

Drawing: Aerial (left) and side (right) views of transverse rumble strips

Aerial (left) and side (right) views of transverse rumble strips (after MnDOT 1999)

Illustration: Aerial view of a roundabout

Aerial view of a roundabout (FHWA n.d.)


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