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

Chrysler, Susan T.; Re, Jon; Knapp, Keith S.; Funkhouser, Dillon S.; Kuhn, Beverly T.; Texas Transportation Institute

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

2009-05-01
By Chrysler, Susan T. ; Re, Jon ; Knapp, Keith S. ; ...

[PDF-1.47 MB]

English

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Details:

Alternative Title:

Project title: Developing comprehensive roadway delineation guidelines
Creators:

Chrysler, Susan T. ; Re, Jon ; Knapp, Keith S. ; Funkhouser, Dillon S. ; Kuhn, Beverly T.

Chrysler, Susan T. ; Re, Jon ; Knapp, Keith S. ; Funkhouser, Dillon S. ; Kuhn, Beverly T. Less -
Corporate Creators:

Texas Transportation Institute
Corporate Contributors:

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Highway Planning Highway Planning--Texas Highway Traffic Control Traffic Control Devices Traffic Signs And Signals--Texas--Psychological Aspects
Publication/ Report Number:

FHWA/TX-09/0-5772-1
Resource Type:

Tech Report
Geographical Coverage:

Texas
Edition:

Technical report; Sept. 2006-Aug. 2008.
Corporate Publisher:

Texas Transportation Institute
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.
Format:

PDF
Funding:

Project 0-5772
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:b3b3dcb32524cf8beb13487646e1a28d048b968177f3064b7cd002b10bcc4d29
Download URL:

https://rosap.ntl.bts.gov/view/dot/16852/dot_16852_DS1.pdf
File Type:

No Additional Files

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

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