The objective of this project is to evaluate MoDOT’s alternate lane shift sign configuration for work zones. Drivers completed the following two driving simulation scenarios: * Scenario 1: Federal Highway Administration (FHWA) approved merge sign configurations, i.e., MUTCD lane shift signs, * Scenario 2: Alternate merge sign configuration proposed by Missouri Department of Transportation (MoDOT) for multiple lane shifts. 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. Gender did have an impact on average speed. Female drivers had a lower average speed than males. The average speed of drivers in MoDOT scenario is less than MUTCD scenario but this difference is not statistically significant. In reviewing the post-simulator questionnaire responses, more drivers were more satisfied with the MoDOT sign configuration than the MUTCD sign configuration and found it more intuitive. Because driver preference is anecdotal rather than statistical, an expanded study might prove useful in refining results and better determining driver preferences and performance. (Author/publisher)
Samenvatting