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In North Carolina, Portable Traffic-Monitoring Devices found to provide a cost-effective and safe means of recording speed and traffic counts in work zones.

METHODOLOGYThe Evaluation Team conducted in-person interviews with NCDOT staff in December 2009 and follow-up telephone interviews with these staff to gain insight into their experiences with the…
Content type
Date Posted
08/19/2013

The use of vehicle probes allowed North Carolina and South Carolina to monitor traffic at a quarter of the cost of microwave or radar detectors.

FINDINGS The North Carolina DOT utilized its traffic monitoring budget more effectively by using vehicle probes in order to increase the needed coverage. With typical remote traffic microwave…
Content type
Date Posted
10/04/2010

Survey responses from key professionals in five states indicate the following ITS technologies have the highest potential to benefit emergency transportation operations: interoperable radio communications, dynamic message signs, GPS and geographical

To gather information and determine the opinions of leaders in the transportation and emergency services communities, a survey was developed and administered to key professionals in the five…
Content type
Date Posted
11/17/2008

In North Carolina, a modeling study indicated that work zone delay messages reduced maximum traffic backups by 56 percent and contributed to 55 percent reduction in traveler delay.

FINDINGS The results of the analysis indicated that when real-time work zone traffic information was provided; the maximum queue length decreased from 2.94 miles to 1.3 miles, maximum traveler delay…
Content type
Date Posted
02/09/2007

An evaluation of infrared brake screening systems at weigh stations indicated the technology increased the percentage of vehicles placed out of service because of brake problems by 250 percent.

This study evaluated an Infrared Screening Inspection System (IRISystem) used to check commercial motor vehicles (CMVs) for brake problems. The technology used infrared cameras housed in mobile vans…
Content type
Date Posted
07/06/2001

Costs to deploy Intersection Collision Warning Systems range from $9,000 to $142,500 depending on number of lanes and if systems are post or overhead mounted.

FHWA organized a pooled fund study of 40 States to evaluate low-cost safety strategies as part of its strategic highway safety effort. One of the strategies selected for evaluation in three states…
Content type
Made Public Date
02/06/2018

From the 511 Deployment Coalition case study: total costs (to design, implement, and operate for one year) averaged $2.5 million among six statewide systems and $1.8 million among three metropolitan systems.