Work Zone Simulator Analysis: Driver Performance and Acceptance of Missouri Alternate Lane Shift Configurations

The objective of this project is to evaluate MoDOT’s alternate lane shift sign configuration for work zones. The single sign proposed by MoDOT provides the traveler with enough information to let them know that all lanes are available to shift around the work zone, whereas the MUTCD signs require drivers to see two signs. This research simulation project evaluates the drivers’ lane shifting performance and acceptance of the alternate lane shift sign proposed by MoDOT to be used on work zones as compared to the MUTCD lane shift signs.  Based on the study results, no difference was observed between MUTCD lane shift sign and MoDOT lane shift sign lane shift patterns with respect to driving patterns. In summary, statistical data analysis clearly demonstrated that there was not a noticeable, statistical difference between lane change patterns of drivers in the MoDOT alternate signs with MUTCD signs in the work zone.

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Report number: cmr17-002
Published: February 2017
Project number: TR201612
Author(s): Suzanna Long
Performing organization: Missouri University of Science and Technology

St. Louis Inlaid Pavement Marker Survey

This report presents results from a survey of a diverse group of motorists perceptions and opinions of inlaid pavement markers.  Respondents participated in one of three ways: They (a) experienced the markers first-hand by driving a designated route with researchers and then completed a questionnaire, (b) were approached at a highway rest stop outside of St. Louis and asked to complete a questionnaire, or (c) were solicited via e-mail and asked to complete an online questionnaire.  Results indicate that motorists overwhelmingly reported favorable perceptions and opinions of inlaid pavement markers.  They reported that the markers enhance visibility of lane delineations, particularly while driving in rain and fog, thus making them feel safer while driving.  Roughly two thirds of all respondents reported that it would be “extremely useful” to have inlaid pavement markers on all roadways, with another 15% of respondents reporting that such omnipresence would be “very useful.” No differences in responding were observed between age, gender, or occupation groups.

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Report number: cmr 17-001
Published: February 2017
Project number: TR201611
Author(s): Drew Leins and Carmine Dwyer

Performing organization: Applied Research Associates, Inc. Transportation Infrastructure Division