Driver response to delineation treatments on horizontal curves on two-lane roads /

Bibliographic Details
Corporate Authors:	Texas. Department of Transportation. Research and Technology Implementation Office, Texas Transportation Institute
Other Authors:	Chrysler, Susan T.
Format:	eBook
Language:	English
Published:	College Station, Tex. : Texas Transportation Institute, Texas A&M University System, [2009]
Series:	Research report (Austin, Tex.) ; 0-5772-1.
Subjects:	Traffic signs and signals > Texas > Psychological aspects. Highway planning > Texas.
Online Access:	Connect to the full text of this online report

Description
Abstract:	The delineation of horizontal curves on two-lane rural roads is an important component of safety improvements to reduce run-off-road and head-on crashes. This project assessed four types of vertical delineation in conjunction with edgeline markings through a closed-course nighttime driving test, a survey of drivers using video clips of curves, and a field test of vehicle performance at four sites in rural Texas. The treatments evaluated were standard post-mounted delineators with a single reflector at top and one with retroreflective material the full length of the post, standard chevrons, and chevrons with yellow retroreflective material applied the full length of the post. The results show that vertical delineation of any type improves vehicle lane position at the entry and mid-point of horizontal curves. Fully reflective postmounted delineators improved lane position and reduced encroachment more than standard posts. The two styles of chevrons performed equally well and both showed significant speed reduction when compared to pavement markings alone.
Item Description:	Title from PDF title screen. "Performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration." "Published May 2009." "Report number FHWA/TX-09/0-5772-1"--Technical report documentation p. Electronic resource.
Physical Description:	1 volume (various pagings) : digital, PDF file with illustrations
Format:	System requirements: Adobe Acrobat Reader. Mode of access: World Wide Web.
Bibliography:	Includes bibliographical references (pages 121-125).