GLARE AND MOUNTING HEIGHT OF HIGH BEAMS USED AS DAYTIME RUNNING LAMPS
This analytical study examined the effects of mounting height on discomfort glare from reduced-power high-beam daytime running lamps. Of interest were the effects for mounting heights between 0.864 m (34 in) and 1.372 m (54 in) - the range in which full-power low beams are currently allowed, but reduced-beams are not. Three analyses were performed. The first analysis involved estimating the illuminance reaching a preceding driver via rearview mirrors. The second analysis compared glare illuminance from reduced-power high beams to that from full-power low beams. The third analysis evaluated the expected changes in discomfort-glare ratings from reduced-power high beams as a function of increased mounting height. The analyses were based on photometric information from 5 high beams and 43 low beams, and they were performed for 5 following distances and 3 lateral offsets of the vehicles.
University of Michigan Transportation Research Institute2901 Baxter Road
Ann Arbor, MI United States 48109-2150
- Sivak, M
- Flannagan, M J
- Aoki, M
- Publication Date: 1995-11
- Pagination: 20 p.
- TRT Terms: Daytime running lamps; Glare; High beamed headlamps; Low beamed headlamps; Luminance; Photometry
- Subject Areas: Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;
- Accession Number: 00723616
- Record Type: Publication
- Report/Paper Numbers: UMTRI-95-40
- Files: TRIS
- Created Date: Jul 1 1996 12:00AM