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1987
LEGIBILITY OF FREEWAY GUIDE SIGNS AS DETERMINED BY SIGN MATERIALS

Transportation Research Record, Issue 1149, pp 22-31

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1987
REGIONAL DIFFERENCES IN PREFERENCES FOR MEDIAN CROSSOVER SIGNING

Transportation Research Record, Issue 1114, pp 37-44

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1986-06
REFLECTORIZED GUIDE SIGNS: HUMAN FACTORS

Transportation Research Circular, Issue 306, p. 6-7

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1986
RETROREFLECTIVE ROAD SIGNS: VISIBILITY AT NIGHT

Transportation Research Record, Issue 1093, pp 58-65

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1985
1982
LEGIBILITY OF HIGHWAY GUIDE SIGNS

Transportation Research Record, Issue 855, pp 1-6

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1982
VISIBILITY AND OPERATIONAL EFFECTS OF GEOMETRICS

Transportation Research Record, Issue 855, 52p

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1980-10
HIGHWAY VISIBILITY RESEARCH NEEDS

Transportation Research Circular, Issue 222, 13 p.

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1980
LUMINAIRE PERFORMANCE ON ILLUMINATED OVERHEAD SIGNS (ABRIDGMENT)

Transportation Research Record, Issue 773, pp 17-20

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1978
PERFORMANCE OF SIGNS UNDER DEW AND FROST CONDITIONS. ABRIDGEMENT

Transportation Research Record, Issue 681, pp 16-20

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1978
LEGIBILITY STUDY OF A LAMP MATRIX SIGN. ABRIDGMENT

Transportation Research Record, Issue 683, pp 5-8

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1977-12
1977
1977
1976
LUMINANCE AND CONTRAST FOR SIGN LEGIBILITY AND COLOR RECOGNITION

Transportation Research Record, Issue 611, pp 17-24

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1976
EVALUATION OF HIGH-INTENSITY SHEETING FOR OVERHEAD HIGHWAY SIGNS

Transportation Research Record, Issue 611, pp 28-34

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1976
OVERHEAD SIGNS WITHOUT EXTERNAL ILLUMINATION

Transportation Research Record, Issue 611, pp 38-44

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1973
REVIEW OF VISIBILITY FACTORS IN ROADWAY SIGNING-WITH DISCUSSION

Highway Research Board Special Report, Issue 134, pp 28-40

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1972
1972
RECOGNITION OF TRAFFIC-CONTROL SIGNS

Highway Research Record, Issue 414, pp 16-23

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