Abstract
The goal of the research presented in this thesis was to study the safety effects of wider longitudinal edgeline pavement markings based on lane position and vehicle speed. Different marking deterioration percentages and roadway geometries on two-lane rural highways were implemented using the University of Idaho’s driving simulator to examine these safety effects. Twenty-four people participated in this study, and the results from the driving simulator experiment suggest that wider longitudinal edgeline pavement markings do not provide safety benefits based on lane position but do provide a minor positive impact by slightly reducing vehicle speeds; however, the speed differential from an operational standpoint is negligible.