D.L. Bullard, D. Lord, A. Abuodeh, W.L. Menges
- Call boxes account for less than 0.5% of all crashes on the freeway system;
- Call boxes account for about 1% of all roadside objects being hit;
- Call boxes are hit more frequently on weekends;
- Call boxes, when hit by a single vehicle, do not generally lead to serious injuries. However, many single vehicle crashes with injuries involved a vehicle overturning either before or after hitting a call box;
- Vehicles do not always strike a call box by the front-end; 65% of the time the vehicle hits the call box sideways or by the back-end;
- The data seems to suggest that Type B leads to more serious injuries;
- The average cost per crash is $1,450.
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