Market-Weighted Trends in the Design Attributes of Headlamps in the U.S.

This report provides updated information regarding the market-weighted prevalence of various headlamp attributes in the U.S. and a summary of recent trends for these design attributes. The main findings were as follows: (1) there was a general transition from dual-filament light sources in 1997 to single-filament sources in 2007; (2) the preferred optics changed from lens-based in 1997 to mostly reflector-based optics in 2007; and (3) while mechanical aim was the most frequently specified aiming methods in 1997, the 2007 sample made nearly exclusive use of visual/optical aiming (with visual/optical right side as the most common specific type).

• Corporate Authors:

  University of Michigan Transportation Research Institute

  2901 Baxter Road
  Ann Arbor, MI  United States  48109-2150

  University of Michigan, Ann Arbor

  Industry Affiliation Program for Human Factors in Transportation Safety
  Ann Arbor, MI  United States  48109
• Authors:
  • Schoettle, B
  • Sivak, M
  • Takenobu, Naoko
• Publication Date: 2007-6

Language

• English

Media Info

• Media Type: Print
• Pagination: 19p

Subject/Index Terms

• TRT Terms: Headlamps; High beamed headlamps; Low beamed headlamps; Optics; Trend (Statistics); Vehicle design
• Uncontrolled Terms: Bulbs; Headlamp aim
• Geographic Terms: United States
• Subject Areas: Design; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01076637
• Record Type: Publication
• Report/Paper Numbers: UMTRI-2007-20
• Files: TRIS
• Created Date: Sep 21 2007 1:54PM