Interaction Between Fixed and Vehicular Illumination Systems.

摘要

The report describes a series of response-detection experiments relating driver response to such variables as illumination level,uniformity ratio,glare,target reflectance,target position and vehicle lighting;the modification of the lighting facilities at the test site (a city block in Philadelphia) to enable lighting levels and uniformity to be independently varied over wide ranges;the development of a data collection system using Tapeswitch to collect all position-velocity-acceleration data; a series of computer programs to reduce and analyze the Tapeswitch data; a review of 1971roadway lighting costs;and a literature review of the relationships between highway lighting safety. The major conclusions of the response-detection experiments were that the Tapeswitch system provides sufficient sensitivity to discriminate across changes in seeing condition,drivers'responses to increased illumination and finer uniformities almost always showed positive change,and vehicle headlighting mode does not seem to contribute significantly to seeing at illumination levels above one footcandle. (Author)