Experimental traffic control device testing at New Hampshire toll plazas.
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2007-06-01
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Alternative Title:Experimental traffic control device testing at New Hampshire toll plazas : purple lights for E-Z pass wayfindings.
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Edition:Final report.
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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.
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Main Document Checksum:urn:sha256:2f1b2a505d1cf26d002a1a4c118d54375ee4b14287d68120a5887ff1d86a4b73