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|
- The ITS improvements would result in decreased vehicle pollutants and reduced fuel use in the Seattle area.
- Full deployment would result in a reduction for all emissions analyzed. Carbon monoxide and hydrocarbon emissions were reduced by approximately 16 percent and 17 percent, respectively, while nitrous oxides were reduced by more than 21 percent.
- Fuel use in the region was cut by more than 1 million gallons per day, a total reduction of more than 19 percent. This represents an average savings of more than 0.1 gallons per trip.
Federal Highway Administration
ITS Joint Program Office