As part of the Geographic Information System (GIS) for infrastructure management being developed for Champaign County, Illinois, statistical and spatial analyses for three key roadway characteristics (safety, congestion level, pavement condition) were conducted. A regression model for predicting accident rate from average daily traffic was also developed. The statistical and spatial analyses showed that high congestion level and/or traffic volume in urban areas are likely to lead to a low degree of safety, but they did not show any significant relationship between the Condition Rating Survey (CRS) and accident rate. However, it is believed that mechanistic models may be more appropriate to study the effect of pavement surface condition on road accidents. (A)
Samenvatting