Construction Management and Technology Program

About the research

There are three work zone countermeasures with an adequate history of use in Iowa (i.e., end-of-queue warnings, speed feedback signs, and portable rumble strips), and now work zone crash modifications factors (WZCMFs) are desired.

Since the data collection, methodological development, and analysis of all three countermeasures is not feasible within the budget for this project. Instead, the researchers will start by collecting data for and developing WZCMFs and other factors for a single countermeasure (i.e., end-of-queue warnings [most likely, as recommended by the team]). However, the determination of the countermeasure for the main focus will be determined through discussions between the research team and Iowa Department of Transportation (DOT).

While collecting the data for the main countermeasure to be evaluated, data for the other countermeasures will be collected, as available. This will result in preliminary datasets being curated to support the WZCMFs and other metric development for the remaining countermeasures. The analysis will then develop the WZCMFs and other appropriate metrics for the target countermeasure.