In the within-intersection area, vehicles from different approaches make turning movements
resulting in many conflict points. Hence, drivers are more prone to make mistakes in that …

Intersections are established dangerous entities of a highway system due to the challenging
and unsafe roadway environment they are characterized for drivers and other road users. In …

One challenge faced by the random-parameter count models for crash prediction is the
unavailability of unique coefficients for out-of-sample observations. The means of the …

Count regression models have been applied to model expected crash frequency at
individual roadway locations. Random parameters have been increasingly integrated into …

Abstract The American Association of State Highway and Transportation Officials' Highway
Safety Manual (HSM) includes a collection of safety performance functions (SPFs) or …

The objective of this research is to model the effect of increasing the freeway posted speed
limit on entry ramp speed-change lane crash frequency. The entry ramps along I-85, I-77, I …

In this study, new performance measures are proposed for hotspot identification in urban
intersections. These measures reflect severity factor weights, which are determined based …

Commercial motor vehicle (CMV) drivers often experience difficulties in turning and crossing
at ramp terminals. CMV-involved crashes could cause queue spillback at ramp terminals …

Crashes involving vulnerable roadway users (VRUs), such as pedestrians and cyclists, have
increased in recent years. Understanding relationships between these crashes and …

Truck crashes in Wyoming are considered a major issue. Nearly 26% of crashes on rural
interstate roads involve hazardous materials (HAZMAT) trucks. Wyoming has a high rate of …