The project focuses on two major issues - the improvement of current work zone design practices and an analysis of vehicle interarrival time (IAT) and speed distributions for the development of a … [Read more...] about Improved Work Zone Design Guidelines and Enhanced Model of Travel Delays in Work Zones. Phase I: Portability and Scalability of Interarrival and Service Time Probability Distribution Functions for Different Locations in Ohio and the Establishment of Improved Work Zone Design Guidelines