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Roadway Operations & Maintenance > Information Dissemination > Internet/Wireless/Phone


Information dissemination technologies such as dynamic message signs or highway advisory radio can be deployed temporarily, or existing systems can be updated periodically to provide information on work zones or other highway maintenance activities. ITS operators may also send this information to in-vehicle devices capable of displaying traveler information.


An automated work zone information system (AWIS) greatly reduced traffic demand through a highway work zone in California resulting reducing maximum average peak delay 50 percent more than expected.(22-26 January 2006)

An evaluation of the Arizona 511 telephone traveler information system found that more than 70 percent of users surveyed were satisfied with the enhanced content provided.(30 September 2005)

Dynamic outreach efforts in a construction workzone in Southern California reduce traffic volume by 20 percent and peak hour delay by 50 percent.(31 July 2005)

In North Carolina, a work zone equipped with smart work zone traveler information systems observed fewer crashes compared to other work zones without the technology.(May 2005)

The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.(October 2004)

The Illinois DOT indicated that an automated traffic control system deployed during the reconstruction of I-55 improved mobility by preventing severe congestion in the work zone. (October 2004)

In North Carolina, a survey of local residents near the Smart Work Zone systems found that over 95 percent of motorists surveyed would support use of these systems in the future.(September 2004)

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.(11-15 January 2004.)

In Albuquerque, New Mexico, work zone surveillance and response at the "Big I" Interchange reduced average clearance time by 44 percent.(4-7 June 2001)

During the first year of operations at the "Big I" work zone in Albuquerque, temporary traffic management and motorist assistance patrols reduced the average incident response time to less than eight minutes, and no fatalities were reported.(4-7 June 2001)

In the Minneapolis/St. Paul, traffic speed data collected at two interstate work zones showed that when portable traffic management systems were deployed, work zone traffic volumes increased 4 to 7 percent during peak periods.(May 1997)

In the Minneapolis/St. Paul, a portable traffic management system (PTMS) installed at two interstate work zones improved safety by slowing approaching vehicles by 9 mi/hr and reducing speed variability by 70 percent. (May 1997)

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.(November 2006)

Illinois DOT implements work zone ITS on the I-64 Add-lane Construction project at a cost of $435,000.(12 September 2005)

Based on a study of 17 states, the majority of work zone ITS cost between $150,000 and $500,000.(12 September 2005)

The annualized life-cycle costs for full ITS deployment and operations in Tucson were estimated at $72.1 million. (May 2005)

A modeling study evaluated the potential deployment of full ITS capabilities in Cincinnati. The annualized life-cycle cost was estimated at $98.2 million.(May 2005)

The annualized life-cycle costs for full ITS deployment and operations in Seattle were estimated at $132.1 million.(May 2005)

A real-time work zone traffic control system leased by the Illinois Department of Transportation cost $785,000.(October 2004)

Detailed costs of road weather information systems deployed at several sites north of Spokane, WA.(8 January 2004)

North Carolina DOT leased its first smart work zone system along I-95 near Fayetteville at a cost of $235,000.(3 June 2003)

The Arkansas State Highway and Transportation Department (AHTD) leased an automated work zone information system in West Memphis for $495,000 which was less than 4% of the total recontruction project cost. West Memphis is one of four locations highlighted in a cross cutting study.(November 2002)

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