In Georgia, call boxes installed on a 39-mile section of I-185 were estimated to eliminate one injury per year, and one fatality every five years.
Troup County,Georgia,United States; Harris County,Georgia,United States; Muscogee,Georgia,United States
Travelers using the call boxes during the first six months of operation reported 920 incidents. To compute the benefit/cost ratio for the call box system, costs were derived from contract costs for maintenance and cellular service and a 10-year amortization of the capital and installation costs for the system. This resulted in a cost for the six-month period of the study of $119,639.87.
Benefits of the call boxes were computed based on the assumed number of injuries and fatalities eliminated and by assigning assumed monetary benefit values to the actual calls received from the call boxes. The study assumed that the call boxes would eliminate one injury per year and one fatality every five years. Using FHWA’s 1998 Technical Advisory on Motor Vehicle Accident Costs, the fatality cost of $2.6 million and the injury cost of $59,000 lead to a benefit of $289,000 over the six-month investigation due to the reduced number of injuries and fatalities. The following table presents the dollar values assigned to the various types of calls received from the call boxes.
Out of Gas
Requests for Directions
(- $ 5)
Call Box Knockdowns
Debris in Road
Applying these values to the call box calls yields an additional benefit of $40,320. Combined with the benefits from avoided injuries and fatalities the total benefit of the call box system becomes $329,820. This yields a benefit-to-cost ratio of 2.76.
Georgia’s Call Box Project: Evaluation and Future Deployment Recommendations, June 2001.
Evaluation of Georgia's Emergency Motorist Aid Call Box Pilot Project
Author: Kolb, Stephanie L., and Elizabeth N. Williams (Transcore), and Karl R. Alff, PE (Georgia DOT)
Published By: Paper presented at the 10th Annual ITS America Meeting, Boston, Massachusetts
Source Date: May 2000
Average User Rating
Typical Deployment Locations
road monitoring, call box