Details:

Alternative Title:
Experimental traffic control device testing at New Hampshire toll plazas : purple lights for E-Z pass wayfindings.
Corporate Creators:
VHB/Vanasse Hangen Brustlin, Inc.
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Automated Toll Collection Automobile Driving--Lane Changing Fare Prepayment Lane Changing Lighting Systems Toll Plazas Toll Plazas--Automation Traffic Control Devices Traffic Signs And Signals Traffic Surveys Uninterrupted Flow Wayfinding
Publication/ Report Number:
FHWA-NH-RD-14282O
Resource Type:
Tech Report
Geographical Coverage:
New Hampshire
Edition:
Final report.
Corporate Publisher:
New Hampshire Department of Transportation
Abstract:
This report includes a description of the testing and evaluation methodology of the “E-ZPassSM Purple Light Experiment.” Purple lights with

advanced signs were installed as supplemental traffic control devices for northbound and southbound E-ZpassSM movements along the I-93

approaches to the Hooksett Toll Plaza (north and south Toll Lanes #4 and #5). The purpose of the purple lights was to improve toll plaza

operations and safety through the reduction in the number of conflicts created by last minute lane changes at the toll booths and weaving

maneuvers that take place between the approach lanes and the toll booths. The Hooksett test site was selected because of the unique

characteristics of the horizontal and vertical geometrics that connect to the toll plaza from the north and south. In addition, this site is prone

to early morning fog, a condition that may be susceptible to improved traffic operations given these wayfinding lights.

The purple light experiment was conducted and evaluated under a scope of work derived from a similar experiment using “p urple dots” as

wayfinding devices conducted in the fall of 2005 by Kittelson and Associates, Inc. for the Maryland Transportation Authority (MTA). The

traffic operational analyses and the presentation of results in this report were prepared for consistency in cross comparison with results

from the MTA’s purple dot experiment. Two distinctly different procedures were used in evaluating the effectiveness of the purple lights;

field data evaluated by several measures of effectiveness (MOE’s) and a customer survey.

The statistical analyses of the four MOE’s and customer survey revealed changed driver behavior in several respects, during a four-week

period in October 2006. The report includes a number of potential modifications for further testing.

An Appendix containing data collected during this study is available from the NHDOT upon request.


Format:
PDF
Funding:
14282O, X-A000(506)
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:2f1b2a505d1cf26d002a1a4c118d54375ee4b14287d68120a5887ff1d86a4b73
Download URL:
https://rosap.ntl.bts.gov/view/dot/25198/dot_25198_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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