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Table 7 Roads with road lighting

From: Effects of weather conditions, light conditions, and road lighting on vehicle speed

Weather condition PSL Darkness–twilight Darkness–daylight Twilight–daylight
TF no. (km/h) (km/h) (%) (km/h) (%) (km/h) (%)
Clear
 9690 30 1.9 6.4 2.9 9.5 0.9 3.2
 7440 50 1.0 2.1 0.3 0.6 −0.8 −1.5
 7460 50 0.3 0.6 −0.3 −0.6 −0.6 −1.2
 9539 50 0.2 0.4 2.2 4.4 2.0 4.0
 9620 50 −0.2 −0.3 0.1 0.2 0.2 0.5
 9697 50 0.6 1.2 −0.1 −0.3 −0.7 −1.4
 2030 60 1.8 3.1 1.9 3.2 0.1 0.1
 9019 60 2.0 3.3 0.4 0.7 −1.5 −2.6
 9402 60 0.3 0.5 1.7 2.8 1.3 2.2
 7310 70 1.4 2.0 −0.2 −0.3 −1.6 −2.3
 7450 70 1.9 2.8 1.0 1.4 −0.9 −1.3
 9945 70 1.3 1.8 1.2 1.6 −0.1 −0.1
 2046 90 −2.4 −2.7 −1.0 −1.1 1.4 1.6
 9876 90 −0.8 −0.9 −2.6 −2.9 −1.7 −1.9
 7340 100 2.3 2.3 0.6 0.6 −1.7 −1.7
 9613 110 −1.4 −1.3 −0.8 −0.7 0.6 0.6
 9614 110 −2.1 −1.9 −2.0 −1.8 0.1 0.1
Mean   0.5 1.1 0.3 1.0 −0.2 −0.1
Rain
 9690 30 1.5 4.9 2.3 7.8 0.9 2.9
 7440 50 0.6 1.1 0.1 0.1 −0.5 −1.0
 7460 50 0.5 1.1 0.0 0.0 −0.6 −1.1
 9539 50 −0.6 −1.1 2.2 4.4 2.8 5.6
 9620 50 0.2 0.4 −0.2 −0.4 −0.4 −0.7
 9697 50 0.3 0.7 −0.1 −0.2 −0.4 −0.9
 2030 60 3.0 5.0 2.4 4.1 −0.6 −1.0
 9019 60 1.5 2.5 1.4 2.3 −0.1 −0.2
 9402 60 −1.0 −1.7 0.6 1.1 1.7 2.8
 7310 70 1.8 2.5 −0.7 −0.9 −2.4 −3.5
 7450 70 1.2 1.8 1.4 2.0 0.2 0.3
 9945 70 −1.7 −2.4 0.1 0.1 1.7 2.5
 2046 90 −4.2 −4.7 −3.8 −4.2 0.4 0.4
 9876 90 −2.2 −2.5 −4.5 −5.0 −2.3 −2.5
 7340 100 3.7 3.7 0.4 0.4 −3.3 −3.3
 9613 110 −0.3 −0.3 −2.1 −1.9 −1.8 −1.6
 9614 110 −1.4 −1.3 −3.0 −2.7 −1.6 −1.4
Mean   0.2 0.6 −0.2 0.4 −0.4 −0.2
Snow
 9690 30 2.6 8.8 1.6 5.5 −1.0 −3.3
 7440 50 2.7 5.3 −0.5 −1.1 −3.2 −6.4
 7460 50 1.4 2.7 −0.9 −1.8 −2.3 −4.5
 9539 50 −1.5 −3.0 0.3 0.5 1.8 3.5
 9620 50 1.3 2.7 0.4 0.7 −1.0 −2.0
 9697 50 1.0 2.1 −1.5 −2.9 −2.5 −5.0
 2030 60 3.4 5.7 2.1 3.5 −1.3 −2.1
 9019 60 3.4 5.7 −0.3 −0.5 −3.7 −6.2
 9402 60 −2.3 −3.9 −0.5 −0.8 1.9 3.1
 7310 70 1.9 2.7 0.2 0.3 −1.7 −2.4
 7450 70 3.5 5.0 0.0 −0.1 −3.5 −5.0
 9945 70 3.2 4.6 2.5 3.6 −0.7 −1.0
 2046 90 −4.2 −4.7 −2.4 −2.7 1.8 2.0
 9876 90 −1.1 −1.2 −1.2 −1.3 −0.1 −0.1
 7340 100 1.3 1.3 −0.5 −0.5 −1.8 −1.8
 9613 110 0.1 0.1 −5.2 −4.7 −5.3 −4.9
 9614 110 −2.2 −2.0 −7.4 −6.7 −5.2 −4.7
Mean   0.9 1.9 −0.8 −0.5 −1.6 −2.4
  1. Average speed differences (km/h) and percentage average speed difference in relation to posted speed limit (%) per road (TF no.) between light condition groups (darkness, daylight, twilight) and divided by weather conditions (clear, rain, snow)
  2. TF no. TF number (identification number for roads), see Tables 1 and 2, PSL posted speed limit. Mean values shown per weather condition group