Vertical Delineation, 2014

(2014) Vertical Delineation, 2014. Transportation, Department of

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Abstract

Vertical delineators are intended to warn drivers of an approaching curve while providing them with a better appreciation of the sharpness of a curve. Drivers can then select an appropriate speed before entering the curve. Delineation can also provide continuous tracking information once drivers are within the curve to help position their vehicles within the travel lane while traversing the curve. The most common type of vertical delineation is post mounted delineators (PMDs). These devices are usually flexible or rigid posts with some amount of reflective surface mounted along the roadside to provide additional delineation. Another treatment that has been used is to provide additional delineation on chevron posts.

Item Type: Departmental Report
Keywords: Countermeasures, Highway curves, Highway delineators, Highway Safety, Perception, Reflective signs, Road markings, Rural highways, Safety, Traffic control devices, Traffic safety, Traffic signs, Visibility
Subjects: Transportation
Transportation > Roads and highways
Transportation > Traffic safety
Transportation > Equipment
ID Code: 19253
Deposited By: Leighton Christiansen
Deposited On: 06 Apr 2015 11:14
Last Modified: 06 Apr 2015 11:14
URI: http://publications.iowa.gov/id/eprint/19253