Research Article
An Efficient Methodology for Calibrating Traffic Flow Models Based on Bisection Analysis
Table 1
Weather-related crash statistics (annual averages 1995–2008) [
3].
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Road weather conditions | Weather-related crash statistics | Annual rates (approximately) | Percentages |
| Wet pavement | 1,128,000 crashes | 18% of vehicle crashes | 75% of weather-related crashes | 507,900 persons injured | 17% of crash injuries | 81% of weather-related crash injuries | 5,500 persons killed | 13% of crash fatalities | 77% of weather-related crash fatalities |
| Rain | 707,000 crashes | 11% of vehicle crashes | 47% of weather-related crashes | 330,200 persons injured | 11% of crash injuries | 52% of weather-related crash injuries | 3,300 persons killed | 8% of crash fatalities | 46% of weather-related crash fatalities |
| Snow/sleet | 225,000 crashes | 4% of vehicle crashes | 15% of weather-related crashes | 70,900 persons injured | 2% of crash injuries | 11% of weather-related crash injuries | 870 persons killed | 2% of crash fatalities | 12% of weather-related crash fatalities |
| Icy pavement | 190,100 crashes | 3% of vehicle crashes | 13% of weather-related crashes | 62,700 persons injured | 2% of crash injuries | 10% of weather-related crash injuries | 680 persons killed | 2% of crash fatalities | 10% of weather-related crash fatalities |
| Snow/slushy pavement | 168,300 crashes | 3% of vehicle crashes | 11% of weather-related crashes | 47,700 persons injured | 2% of crash injuries | 8% of weather-related crash injuries | 620 persons killed | 1% of crash fatalities | 9% of weather-related crash fatalities |
| Fog | 38,000 crashes | 1% of vehicle crashes | 3% of weather-related crashes | 15,600 persons injured | 1% of crash injuries | 2% of weather-related crash injuries | 600 persons killed | 1% of crash fatalities | 8% of weather-related crash fatalities |
| Weather-related | 1,511,200 crashes | 24% of vehicle crashes | 629,300 persons injured | 21% of crash injuries | 7,130 persons killed | 17% of crash fatalities |
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