Relative Visibility of Increased Legend Size versus Brighter Materials forTraffic Signs

摘要

The objective of the research was to determine, for older and younger drivers,the relative conspicuity and legibility of signs with different retroreflective materials containing legends using different strike widths and other stylistic variations. With respect to legibility, the principal objective was to determine the font, stroke width, and spacing that would optimize legibility (particularly for older drivers) for each retroreflective material tested. With regard to conspicuity, the objective was to determine the detection/recognition distance under controlled and comparable visual surroundings for different materials and sizes of signs with the optimum legend stroke width.