@article{ref1,
title="The slash obscures the symbol on prohibitive traffic signs",
journal="Human factors",
year="1976",
author="Dewar, Robert E.",
volume="18",
number="3",
pages="253-258",
abstract="The problem of whether drivers should be told what they can do (permissive message) or what they cannot do (prohibitive message) is discussed as it relates to traffic sign symbols. A widely used version of the prohibitive message (symbol surrounded by a red ring with a slash through the symbol) was found to have limited legibility because the slash obscures the symbol. Two experiments examined the glance legibility of 15 symbols under each of four conditions-slash over symbol, slash under symbol, partial slash, and no slash. The results indicated that the glance legibility of traffic sign symbols is better when no slash or a partial slash is used to convey the prohibitive message.<p /><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="10.1177/001872087601800306",
url="http://dx.doi.org/10.1177/001872087601800306"
}