Standard incandescent brake lamps have a relatively slow rise time. It takes approximately a quarter of a second for them to reach 90% of asymptotic light output, causing potential delays in responses by following drivers. The present study evaluated reaction times to brake signals from standard incandescent brake lamps and from three alternative brake lamps with substantially faster rise time: neon, LED, and fast incandescent. The study, performed in a laboratory, simulated a daytime driving condition. The subject's task was to respond as quickly as possible to the onset of either of two brake lamps in the visual periphery, while engaged in a central tracking task. Brake signals were presented at two levels of luminous intensity. The results showed that reaction times to the alternative brake lamps were faster than to the standard incandescent lamp, with the advantage averaging 166 ms for the LED and neon lamps, and 135 ms for the fast incandescent lamp.


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    Title :

    Reaction Times to Neon, LED, and Fast Incandescent Brake Lamps


    Contributors:
    M. Sivak (author) / M. J. Flannagan (author) / T. Sato (author) / E. C. Traube (author) / M. Aoki (author)

    Publication date :

    1993


    Size :

    36 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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