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Headlamps and pedestrian injuries
This study examined existing U.S. data on the contribution of headlamp hardware to pedestrian injuries in crashes. Three sets of pedestrian crash data were used. The first set included all police-reported pedestrian crashes from five states. The analyzed variable was the initial point of impact on...
Vehicle kinematics in turns and the role of cornering lamps in driver vision
SAE Recommended Practice J852 and ECE Regulations 119 and 48 for cornering lamps were compared. Photometric points described in each specification were then compared to naturalistic lowspeed turn trajectories produced by 87 drivers. Future locations of a vehicle engaged in a turn were calculated...
Benefits of daytime running lights
This study evaluated the effects of daytime running lights (DRLs) on two-vehicle, head-on crashes of passenger vehicles during daylight, dawn, and dusk. Two control dimensions were used: type of crash (the control being single-vehicle crashes) and light condition (the control being darkness). The...
Differences in geometry of pedestrian crashes in daylight and darkness
Introduction: Previous studies have shown that increased risk in darkness is particularly great for pedestrian crashes, suggesting that attempts to improve headlighting should focus on factors that likely influence those crashes. The current analysis was designed to provide information about how...
Heavy trucks, conspicuity treatment, and the decline of collision risk in darkness
Introduction: The influence of amendments to Federal Motor Vehicle Safety Standard (FMVSS) 108, requiring conspicuity treatments on heavy tractors and trailers, was determined in analyses of the odds of fatal collisions in darkness. Method: Comparisons were made between crashes in which conspicuity...
The influence of rear turn-signal characteristics on crash risk
Introduction: The relationship between the relative risk of a rear-end collision during a turn, merge, or lane change maneuver and the characteristics of the rear turn-signal configuration was examined using crash data from seven states in the United States. Method: Rear turn-signal characteristics...
Trends in fatal U.S. crashes in darkness : 1990 to 2006.
Fatal crash trends in the United States between 1990 and 2006 were examined for changes in the ratio of crashes in darkness to crashes in daylight to determine whether recent improvements in vehicle forward headlighting might have influenced the dark/light ratio. A general decline in the ratio was...
Visual fatigue and the driver
The last fifty years of research on visual fatigue are surveyed, with special emphasis on results that may be important in the context of driving. Over that time, ideas about visual fatigue have varied, ranging from a broad application of the label eyestrain, to virtually any visual complaint (...
Driver perception of potential pedestrian conflict
The objective of this study was to provide information about drivers- needs and preferences for the characteristics of pedestrian detection systems that would be useful to the designers of cars and of pedestrian detection systems. In this study, we varied parameters that determine a pedestrian-s...
Mirror size and lane-change crashes.
This study examined the relationship between the size of the driver-side outside mirror and the frequency of lane-change crashes. To control for other vehicle and driver differences that might be associated with mirror size, the frequency of going-straight-ahead crashes was used for comparison. The...

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