TY  - JOUR
PY  - 1976//
TI  - The slash obscures the symbol on prohibitive traffic signs
JO  - Human factors
A1  - Dewar, Robert E.
SP  - 253
EP  - 258
VL  - 18
IS  - 3
N2  - 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> 
LA  - en
SN  - 0018-7208
UR  - http://dx.doi.org/10.1177/001872087601800306
ID  - ref1
ER  -