Glare from headlamps reflected in rearview mirrors is different in several ways from glare caused by oncoming vehicles. As pointed out by Olson and Sivak (1984), glare from rearview mirrors is compounded because headlamps are often visible in more than one mirror, and because exposure to glare from rearview mirrors is often of much longer duration. The difference in duration is due to the fact that a following vehicle, unlike an oncoming vehicle, may remain in the same relative position for a long time. However, the problem of rearview mirror glare is in some ways more tractable than the problem of oncoming glare. Several options are available to reduce mirror glare while still allowing a driver to see adequately in the rearview mirror. Prism mirrors, which can be switched between reflectance of about 80% and 4%, have been widely used for many years. Electronic, variable reflectance mirrors are now also widely available. In order to make the best use of such countermeasures, it is useful to know how the geometry of a vehicle and the locations of the mirrors affect the amount of glare to which each mirror will be exposed. This report outlines the major differences in the glare levels that can be expected on the mirrors of different vehicle classes (passenger cars versus light trucks and vans (LTVs)) and on different mirrors of a single vehicle.


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    Title :

    Rearview Mirror Glare With Varting Vehicle Geometries


    Contributors:

    Publication date :

    2005


    Size :

    28 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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