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2001
PHOTOMETRIC REQUIREMENTS FOR ARROW PANELS AND PORTABLE CHANGEABLE MESSAGE SIGNS

Transportation Research Board Conference Proceedings, Issue 23, p. 215-221

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1999
LEGIBILITY OF TRAFFIC SIGN TEXT AND SYMBOLS

Transportation Research Record, Issue 1692, p. 142-151

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1999
PERFORMANCE COMPARISON OF THREE FREEWAY GUIDE SIGN ALPHABETS

Transportation Research Record, Issue 1692, p. 9-16

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1999
BUS ACCESSIBILITY FOR PEOPLE WITH SENSORY DISABILITIES

Transportation Research Record, Issue 1671, p. 40-47

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1997
EFFECTS OF FONT AND CAPITALIZATION ON LEGIBILITY OF GUIDE SIGNS

Transportation Research Record, Issue 1605, p. 73-79

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1997
MODEL GUIDELINES FOR VISIBILITY OF ON-PREMISE ADVERTISEMENT SIGNS

Transportation Research Record, Issue 1605, p. 80-87

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1996
PHOTOMETRIC REQUIREMENTS FOR ARROW PANEL VISIBILITY

Transportation Research Record, Issue 1553, p. 66-72

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1995
1995
TRAFFIC SIGN READING DISTANCES AND TIMES DURING NIGHT DRIVING

Transportation Research Record, Issue 1495, p. 140-146

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1994
Traffic signing, signals, and visibility

Transportation Research Record, Issue 1456, 145p

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1992
MAXIMIZING LEGIBILITY OF TRAFFIC SIGNS IN CONSTRUCTION WORK ZONES

Transportation Research Record, Issue 1352, p. 25-34

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1992
DYNAMIC LANE ASSIGNMENT USING FIBER-OPTIC SIGNS

Transportation Research Record, Issue 1368, p. 10-17

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1991
LEGIBILITY AND CONTRAST REQUIREMENTS OF VARIABLE-MESSAGE SIGNS

Transportation Research Record, Issue 1318, p. 137-141

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1989
REDESIGN AND EVALUATION OF SELECTED WORK ZONE SIGN SYMBOLS

Transportation Research Record, Issue 1213, p. 47-55

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1988
SIGN LEGIBILITY AND CONSPICUITY

Transportation Research Board Special Report, Issue 218, pp 270-293

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1988
CRITERIA FOR THE DESIGN AND EVALUATION OF TRAFFIC SIGN SYMBOLS

Transportation Research Record, Issue 1160, p. 1-6

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1987
VISIBILITY FOR HIGHWAY GUIDANCE AND HAZARD DETECTION

Transportation Research Record, Issue 1149, 76p

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