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Table 1 Results from the questionnaire survey
From: Recognition of built-up and non-built-up areas from road scenes
Clearly non-built-up sites (90Â km/h speed limit) | ||||||
|---|---|---|---|---|---|---|
Site No. | 1 | 2 | 3 | 4 | 5 | Average |
Average speed (km/h) | 85.9 | 81.6 | 88.1 | 88.2 | 86.6 | 86.1 |
Standard deviation (km/h) | 10.2 | 10.8 | 8.7 | 9.3 | 9.3 | 9.7 |
Relative standard deviation (%) | 12Â % | 13Â % | 10Â % | 11Â % | 11Â % | 11Â % |
v85 (km/h) | 96.5 | 92.8 | 97.0 | 97.8 | 96.3 | 96.1 |
Clearly built-up sites (50Â km/h speed limit) | ||||||
 Site No. | 6 | 7 | 8 | 9 | 10 | Average |
 Average speed (km/h) | 52.0 | 46.3 | 48.6 | 48.5 | 43.4 | 47.8 |
 Standard deviation (km/h) | 5.3 | 8.1 | 6.4 | 8.1 | 7.8 | 7.2 |
 Relative standard deviation (%) | 10 % | 18 % | 13 % | 17 % | 18 % | 15 % |
 v85 (km/h) | 57.5 | 54.7 | 55.2 | 56.8 | 51.5 | 55.1 |
Transition areas (speed limit?) | ||||||
 Site No. | 11 | 12 | 13 | 14 | 15 | Average |
 Average speed (km/h) | 61.1 | 71.0 | 55.3 | 59.4 | 68.6 | 63.1 |
 Standard deviation (km/h) | 12.3 | 15.2 | 9.2 | 11.1 | 16.2 | 12.8 |
 Relative standard deviation (%) | 20 % | 21 % | 17 % | 19 % | 24 % | 20 % |
 v85 (km/h) | 73.9 | 86.8 | 64.8 | 70.9 | 85.4 | 76.4 |