The Federal Highway Administration initiated a study to explore the benefits and costs of fully deploying operational strategies and integrating ITS in the large metropolitan area of Seattle. The strategies included in Seattle's Full Operations and ITS Deployment Scenario were identified by consulting with local agencies to identify the overall ITS program planned through the next 25 years. The benefits are contingent on complete deployment of the full operations and ITS deployment scenario. The selected strategies are listed in the following table.
|Arterial Traffic Management Systems||Central Control Signal Coordination|
|Emergency Vehicle Signal Preemption|
|Transit Vehicle Signal Priority|
|Freeway Management Systems||Central Control Ramping Metering|
|Transit Management||Fixed-Route Automated Scheduling and Automatic Vehicle Location|
|Fixed-Route Security Systems|
|Electronic Transit Fare Payment|
|Incident Management Systems||Incident Detection, Verification, Response, and Management|
|Emergency Management Systems||Emergency Vehicle Control Service|
|Emergency Vehicle AVL|
|Traveler Information||Phone- and Web-Based Traveler Information System|
|Kiosk-Based Traveler Information|
|Highway Advisory Radio|
|Dynamic Message Signs|
|Crash Prevention and Safety||Railroad Crossing Monitoring Systems|
|Commercial Vehicle Operations||Weigh-in-Motion and Safety Information Exchange|
|Combination Screening and Clearance|
|Supporting Deployment||Traffic Management Center|
|Transit Management Center|
|Information Service Provider Center|
|Closed Circuit TV and Loop Detectors|
- Personal travel times reduced by an average of more than 120,000 hours daily in the Seattle area with full implementation of operations and ITS strategies.
- The average daily reduction of 3.7 percent amounts to an average of more than eight hours saved per resident in the area annually.
- The results of full deployment were found to be more effective reducing travel times during congested periods.
- Travel times in the afternoon commute period were reduced by 6.1 percent versus a reduction of 0.5 percent during the less congested, non-commute period.
- Additionally, transit riders are expected to experience greater travel time improvements, averaging more than six minutes per trip during the afternoon commute, an approximate 24 percent decrease in their average trip time.
Federal Highway Administration
ITS Joint Program Office