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Vehicle Lighting and Signaling

UMTRI researchers study the effects of nighttime driving in terms of nighttime visibility and the effectiveness of various types of headlights. Researchers investigate driver preferences for tungsten-halogen versus high-intensity-discharge (HID) headlamps, discomfort glare from HID headlamps, night-vision-enhancement systems, and drivers\' use of high- and low-beam headlamps. They also study the viability of rear lighting systems, mirror-mounted turn signals, and the development of a headlighting rating system.

Recent Publications

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Heavy trucks, conspicuity treatment, and the decline of collision risk in darkness
John M. Sullivan, Michael J. Flannagan.

journal article UMTRI-2011-18
IN: Journal of Safety Research. Vol. 43, issue 3 (July 2012), p. 157-161.

Introduction: The influence of amendments to Federal Motor Vehicle Safety Standard (FMVSS) 108, requiring conspicuity treatments on...

The influence of rear turn-signal characteristics on crash risk
John M. Sullivan, Michael J. Flannagan.

journal article IN: Journal of Safety Research. Vol. 43, issue 1 (Feb. 2012), p. 59-65.

Introduction: The relationship between the relative risk of a rear-end collision during a turn, merge, or lane change maneuver and the...

Benefits of daytime running lights
Michael Sivak, Brandon Schoettle.

report UMTRI-2011-6

This study evaluated the effects of daytime running lights (DRLs) on two-vehicle, head-on crashes of passenger vehicles during daylight...

Differences in geometry of pedestrian crashes in daylight and darkness
John M. Sullivan, Michael J. Flannagan.

journal article IN: Journal of Safety Research. Vol. 42, no. 1 (2011), p. 33-37.

Introduction: Previous studies have shown that increased risk in darkness is particularly great for pedestrian crashes, suggesting that...

Vehicle kinematics in turns and the role of cornering lamps in driver vision
John M. Sullivan, Michael J. Flannagan.

journal article UMTRI-2010-32
IN: Leukos. Vol. 7, no. 4 (2011), p. 263-271.

SAE Recommended Practice J852 and ECE Regulations 119 and 48 for cornering lamps were compared. Photometric points described in each...