关键词: |
glare control,rearview mirrors,windshields,headlamps,neodymium oxide doping,color-corrected;data analysis, implementation plans, investigator profiles, investigations, visual effectiveness, road tests, motor vehicles, optometric examinations;expert review |
摘要: |
This report documents the work done in a Safety IDEA research project on the visual effectiveness of Neodymium Oxide doped headlights, rear view mirrors, and windshields in reducing glare and improving vision. This research project had two stages: clinical optometric experimentation under controlled conditions, and a subjective road test. Truck drivers with commercial driver's licenses were recruited by advertising in local newspapers on Long Island. The subjects were all given a standard optometric examination. Of the 30 subjects, who were paid for their participation in the study, 29 needed a new optometric prescription. Another 14 had significant eye pathologies. Subjects were both male and female and ranged in age from 29 to 75, with just 2 subjects under 40 years in age. After completion of the standard optometric examination, subjects were run through a series of 9 tests involving vision tasks that might be expected of a motorist. These tests involved the ability to identify lettering through various types of windshield and mirror glass, the ability to discern colored signs at low light levels, and the ability to see yellow turn signals. Other tests compared stereoscopic depth perception, and the length of time after images remain after exposure to glare. Subjects were then divided into two groups after completion of the controlled optometric tests. One group received new standard headlights on their vehicle, and the other group received new Neodymium Oxide doped headlights. Subjects were then asked to drive 23.6 miles at night, going south, and turning around and going back north to the starting point, on a 6 lane divided expressway on Long Island. To eliminate any possible interference from road lights, the route chosen was a road without artificial highway illumination. Subjects were asked to agree or disagree with a series of statements concerning the quality of the headlight lighting, and to estimate ultimate seeing distances of the large green highway signs in low beam and high beam. All data from the optometric testing and the road test was put through a series of rigorous statistical tests. / Supplementary Notes: Sponsored by Federal Motor Carrier Safety Administration, Washington, DC. and Federal Railroad Administration, Washington, DC. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A04/MF A04 / NTIS In-house Control Codes: nastrb/dotfra/dotmcs;12111,1101 |