Knowledge Resources

In St. Louis County, Missouri, full closure of portions of I-64 for two years allowed for an accelerated construction schedule, saving taxpayers between $93 million and $187 million.(November 2011)

In the Washington DC metropolitan area, drivers who use route-specific travel time information instead of wide-area traffic advisories can improve on-time performance by 5 to 13 percent.(9-13 January 2005)

In Southeast Pennsylvania, survey results indicated that users of the SmarTraveler website were more likely to use the service again compared to users of the SmarTraveler telephone service.(19-22 May 2003)

A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system reduced vehicle-hours of delay by 3.4 percent and reduced the total number of stops by 5.5 percent.(6-9 November 2000)

A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system increased throughput by 0.1 percent.(6-9 November 2000)

Simulation results indicated that vehicle emissions could be reduced by two percent if arterial traffic flow data were included in the traveler information system in Seattle, Washington.(30 May 2000)

Modeling indicated that coordinating fixed signal timing plans along congested arterial corridors leading into Seattle, Washington, and incorporating arterial traffic flow data into the traveler information system would reduce vehicle delay by 7 percent and 1.8 percent, respectively.(30 May 2000)

A model determined that incorporating arterial traffic flow data into the traveler information system in Seattle, Washington could decrease the number of stops by 5.6 percent.(30 May 2000)

Users of the Advanced Traveler Information System in Seattle, Washington were satisfied with the information on freeway and transit conditions provided via Web sites and a Traffic TV service.(30 May 2000)

An evaluation of traffic information used by travelers in the Detroit area, in 2000, found that most drivers perceived commercial radio as "more reliable" than television or dynamic message sign information. (May 2000)

In Phoenix, Arizona, an evaluation of traveler information provided on cable television found that 29 percent of surveyed respondents thought the traffic channel was useful.(April 2000)

A simulation study indicated that vehicle throughput would increase if arterial data were integrated with freeway data in an Advanced Traveler Information System in Seattle, Washington. (September 1999)

A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could reduce emissions by 1 to 3 percent, lower fuel consumption by 0.8 percent, and improve fuel economy by 1.3 percent.(September 1999)

A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could diminish delay by 1 to 7 percent, reduce stops by about 5 percent, lower travel time variability by 2.5 percent, and improve trip time reliability by 1.2 percent.(September 1999)

In San Francisco, the TravInfo telephone service had a high level of customer satisfaction with the two highest ranking aspects of TravInfo being convenience (average score = 4.2) and ease of comprehension (average score = 4.3) on a scale of one to five, with five being very satisfied.(12-16 October 1998)

In Minneapolis, a traffic incident information pager service was used daily by 65 percent of participants, and at least once-per-week by 88 percent of participants; users decided to changed travel routes in 42 percent of the situations.(10 June 1997)

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Treat maintenance staff as customers and beneficiaries of ATIS information.(5/1/2005)

Treat system operators as the client and consider their perspectives during ATIS project development.(5/1/2005)

Consider how implementing an ATIS system will impact staffing and training requirements.(5/1/2005)

Consider that ATIS deployment in rural and/or remote areas presents special challenges.(5/1/2005)

Use ITS to implement a reliable communications system in work zones.(1/1/2004)

Ensure initial and ongoing success of ITS deployments by providing sufficient start-up time, maintaining flexibility, and performing maintenance needs in-house.(1/1/2004)

Provide consistent and high-quality information to influence traveler behavior.(6/1/1998)