Research Article
Predicting Work Zone Collision Probabilities via Clustering: Application in Optimal Deployment of Highway Response Teams
Table 1
Input variables considered in the analysis of WZ collisions.
| | Day of the week when the WZ was opened (nominal) | Duration of the WZ at night (continuous) | | Season of the year when the WZ was operational (nominal) | Total number of lanes (ordinal) | | Road class (nominal: MD, I, US) | Number of main lanes closed (ordinal) | | Duration of the WZ during the peak hours (continuous) | Number of shoulder lanes closed (ordinal) | | Duration of the WZ during the off-peak hours (continuous) | Number of median lanes closed (ordinal) | | Duration of the WZ in daylight (continuous) | Average annual daily traffic (AADT) (ordinal) |
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