Cost-benefit analysis of ITS project in the Houston, Texas.
In January 2015, overheight vehicle detection systems (OHVDS) were implemented on Interstate I-10 in Houston to improve safety for truckers and reduce numbers of overheight vehicle hits on several low-clearance bridges (35 hits in 2014).
Two detection systems were deployed. Each used an active dual-beam infrared sensor installed 14 feet above the roadway to detect overheight trucks and then activate a dedicated dynamic message sign (DMS) to warn drivers via a single-phase three-line message indicating "OVERHEIGHT MUST EXIT I-160." To further encourage compliance, overhead static warning signs were installed in 2018 with the messge "TRUCK HEIGHT MEASUREMENT ZONE AHEAD" and cameras were used to capture violators.
The overall cost to purchase and install the system was estimated at $100,000 per location.
OVHDS: $100K per site.