Transcription of Seeing With Headlights
{{id}} {{{paragraph}}}
Example: bachelor of science
Seeing With Headlights
Seeing With HeadlightsGene Farber, ConsultantNHTSA Workshop on Headlamp Safety MetricsWashington, DC July 13, 2004, 2 You can t see worth a damn atnight (Paul Olson) Day/night illumination ratio: 105 Pedestrian visibility distancenight: 150 - 250 feet day: 1000 s of feet Distance required to respond and stop from 55 mph: 265 feet3 Night drivers have little time to respond to obstacles Best data on PRT gives means of to seconds 85thpercentile values of to seconds. Glance durations can range from to seconds (IP tasks, mirror looks, looks to the side, etc.) Effective response latency of or more sec4 Over-driving Headlights Headlamps provide enough light for primary driving task of lane-keeping Low visibility obstacles are extremely rare and thus not expected Driver s (and pedestrians) over-estimate visibility Result: we over-drive Headlights WRTobstacles but not Headlamp Seeing distance program developed at Ford Based on Blackwell data and formulations Estimates Seeing distance as influenced by human, environmental and lighting parameters Validated in early 70 s in field studies6 Pedestrian, tallTarget type, size Nor
4 Over-driving Headlights • Headlamps provide enough light for primary driving task of lane-keeping • Low visibility obstacles are extremely rare
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: