Variance and multiple range test techniques were used to determine differences between driver performances under different levels of information; results indicated that audio messages were as effective as visual messages and when given together, performance of test drivers was generally better than that of test drivers with only visual or audio messages; radio-signing system can be effective and avoid superfluous signing.
Study of feasibility of using roadside communications for traffic control and driver information
Nat Research Council -- Highway Research Board -- Research Rec
1967
35 pages
Article (Journal)
English
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