A meta-analysis of studies reported outside the United States was performed to evaluate the
effects on road safety of converting intersections to roundabouts. Twenty-eight studies that …

As roundabouts become increasingly popular, and as many communities promote bicycle
use, the safety of roundabouts for people bicycling is of major concern. Although converting …

Artificial intelligence research is ushering in a new era of sophisticated, mass-market
transportation technology. While computers can already fly a passenger jet better than a …

“A grave problem that developed in New Hampshire… now has all the motor-vehicle
commissioners of the eastern states in a wax. It's whether radios should be allowed on cars …

Introduction: Motorcyclists are exposed to more fatalities and severe injuries per mile of
travel as compared to other vehicle drivers. Moreover, crashes that take place at …

This paper formulates and estimates an econometric model, referred to as the latent
segmentation based generalized ordered logit (LSGOL) model, for examining driver injury …

TRB's National Cooperative Highway Research Program (NCHRP) Report 672:
Roundabouts: An Informational Guide-Second Edition explores the planning, design …

Urban air quality is generally poor at traffic intersections due to variations in vehicles' speeds
as they approach and leave. This paper examines the effect of traffic, vehicle and road …

While rural freeways generally have lower crash rates, interactions between driver behavior,
traffic and geometric characteristics, and adverse weather conditions may increase the crash …

The empirical Bayes (EB) methodology has been applied for over 20 years now in
conducting statistically defendable before–after studies of the safety effect of treatments …