Traffic incidents are a major source of congestion and travel time uncertainty. Traditionally, extensive attention has been given to accidents in the view of safety when studying occurrence frequency. The regularity of incident frequency, however, deserves equal attention by practitioners and researchers, especially on urban expressways with dense ramps and high traffic volume. The objective of...

Motorcycle is a popular mode of transportation in many developing countries, including Pakistan. Since the last decade, registered number motorcycles Pakistan has increased by six times, constituting 74% total vehicles. However, limited research efforts have been made to investigate motorcycle-related safety issues Thus, relationship between potential risk factors and injury outcomes motorcycle...

The NHTSA Office of Crash Avoidance Research (OCAR), in conjunction with the Research and Special Programs Administration (RSPA) Volpe National Transportation Systems Center (VNTSC), has underway a multi-disciplinary program to: identify crash causal factors and applicable countermeasure concepts, model target crash scenarios and Intelligent Vehicle Highway System (IVHS) technological intervent...

Median barrier is used to prevent cross-median crashes on divided highways. Although it is well documented that crash frequencies increase after installing median barrier, little is known about median barrier crash severity outcomes. The present study estimated a nested logit model of median barrier crash severity using 5 years of data from rural divided highways in North Carolina. Vehicle, dri...

OBJECTIVES Road traffic crashes that involve very high numbers of fatalities and injuries arouse public concern wherever they occur. In China, there are two categories of such crashes: a crash that results in 10-30 fatalities, 50-100 serious injuries or a total cost of 50-100 million RMB ($US8-16m) is a "serious road traffic crash" (SRTC), while a crash that is even more severe or costly is a "...

BACKGROUND Complications from diabetes mellitus can compromise a driver's ability to safely operate a motor vehicle, yet little is known about whether euglycemia predicts normal driving risks among adults with diabetes. We studied the association between glycosylated hemoglobin (HbA1c) and the risk of a motor vehicle crash using a population-based case control analysis. METHODS AND FINDINGS W...