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Publication Number: FHWA-HRT-04-139
Date: December 2005

Enhanced Night Visibility Series, Volume VIII: Phase II—Study 6: Detection of Pavement Markings During Nighttime Driving in Clear Weather

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APPENDIX I—PAVEMENT MARKING MEAN DETECTION DISTANCES AND SNK GROUPINGS FOR THE VES MAIN EFFECT

 

Table 12. Mean beginning and ending detection distances and SNK groupings (means with the same letter are not significantly different) of pavement markings for the VES main effect.
VES Beginning
Detection
Distance (ft)
Ending
Detection
Distance (ft)
HLB Mean: 297.6
AB
Mean: 250.5
A
Hybrid UV–A + HLB Mean: 307.5
A
Mean: 241.1
AB
Three UV–A + HLB Mean: 294.1
AB
Mean: 243.1
AB
Five UV–A + HLB Mean: 294.4
AB
Mean: 251.0
A
HID Mean: 253.9
CD
Mean: 198.6
CDE
Hybrid UV–A + HID Mean: 263.0
C
Mean: 195.7
DE
Three UV–A + HID Mean: 251.1
CD
Mean: 206.8
CDE
Five UV–A + HID Mean: 258.4
CD
Mean: 217.1
CD
HOH Mean: 285.1
B
Mean: 245.7
A
HHB Mean: 256.0
CD
Mean: 221.4
BC
HLB–LP Mean: 241.2
D
Mean: 184.5
E

 

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