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Seattle Study Showed 30 Percent Reduction in Travel Time, From 27 Minutes to 19 Minutes, When Integrating On-Demand Shared Mobility With Transit Service Compared to Fixed-Route Buses.

METHODOLOGY The study consisted of two parts. First, it developed a theoretical framework to analyze the costs of various transportation options, based on three principles: (i) using marginal cost…
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Date Posted
04/30/2023

Risk Analysis Using Crash and Near-Crash Data Finds a 26 Percent Reduction in Likelihood of a Crash Involving Severe Injuries in a Connected Vehicle Versus a Vehicle with More Traditional Line of Sight System.

METHODOLOGY The study utilized the SHRP2 NDS database that consisted of over 5.5 million trips driven by 3,542 drivers across six sites in the U.S. First, relevant events from the database were…
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Date Posted
04/24/2023

Incentive-Based Carpooling Application Launched in Seattle Area Led to 85 Percent Reduction in Single Occupancy Vehicle Mode Share, Based on the Participants’ Survey Responses.

METHODOLOGY Data-based research is undertaken to evaluate the effects of various strategies that can facilitate carpooling through a collaboration between the public and the private sector in the…
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Date Posted
08/17/2022

Use of common carrier lockers for urban freight delivery to Seattle Municipal Tower reduces total delivery time by 78 percent, with zero failed deliveries.

FINDINGS The average time it took the UPS driver to make door-to-door deliveries in the Municipal Tower was 27 minutes, with the driver visiting seven different floors on average. In contrast, the…
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Date Posted
12/30/2019

Transportation network company (TNC) usage is associated with decreased vehicle ownership and fewer single occupancy vehicle trips.

The study attempts to broaden the understanding of the interplay among emerging and established modes of transportation by approaching from several angles the question of how shared modes, and…
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Date Posted
09/12/2018

On-time performance of transit trips across the SR 520 bridge improved by 42 percent during peak periods after deployment of electronic tolling.

Findings From pre-deployment to post-deployment of electronic tolling on the SR 520 bridge, on-time performance of transit routes crossing the bridge improved from 47 percent to 67 percent in the…
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Date Posted
01/18/2018

Transit ridership increased by 38 percent on SR 520 after deployment of pricing and electronic tolling.

Transit enhancements included 44 new buses and 90 additional one-way peak period trips across the SR 520 bridge; improvements to transit stops and park-and-ride lots; and new travel time signs.…
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Date Posted
01/08/2018

Deployment of variable rate, all-electronic, open road tolling on SR-520 Bridge near Seattle yielded $55 million of revenue in 2012.

Findings A key driver of adding tolls to the existing SR 520 bridge was to generate revenue for a replacement bridge. The SR 520 tolls generated $54,879,495 in 2012 during the 2012 post-deployment…
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Date Posted
12/11/2017

After deployment of pricing and electronic tolling on SR 520, travel-time reliability improved by 6 to 13 minutes during peak periods on that route.

Findings Travel-time reliability, measured by the 95th percentile travel time, improved on SR 520 in the post-deployment period, declining in the morning peak period by approximately 3 minutes…
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Date Posted
11/20/2017

Free floating, one-way car sharing model reduces GHG per household by up to 18 percent

Car2go is currently the largest carsharing operator in the world, with a presence in nine countries and nearly 30 cities. It operates as a one-way instant access carsharing system within a pre-…
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Date Posted
01/06/2017

Archived data management systems benefit planning and decision-making within agencies

Full ITS deployment in Seattle projects personal travel time reductions of 3.7 percent for drivers and 24 percent for transit users.

BenefitsPersonal 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…
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Date Posted
02/09/2016

Full ITS deployment in Seattle projects vehicle speeds to increase by as much as 12 percent on major roadways.

BenefitsOverall, vehicle speeds on Seattle's road network increased by less than 1 percent on a daily basis as a result of the ITS deployments. The majority of the speed increase was observed on…
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Date Posted
02/09/2016

Full ITS deployment in the Seattle area projected to reduce recurrent congestion delays by 3.2 percent and incident related delays by 50 percent.

BenefitsThe ITS deployment was shown to improve system speeds and reduce delay, particularly during congested, delay-prone commute hours. Overall reduction in delay caused by recurring congestion was…
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Date Posted
02/09/2016

Full ITS deployment in the Seattle area projected to result in 8 percent fewer fatal crashes, and 3 percent fewer injury and property damage only crashes annually.

Benefits By lessening congestion and smoothing traffic flows, the ITS deployment resulted in the elimination of more than seven crashes per day in the Seattle area. The deployment of incident and…
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Date Posted
02/09/2016

Full deployment of comprehensive ITS strategies in Seattle are projected to reduce CO, HC, and NOx emissions by 16 percent, 17 percent and 21 percent, respectively and reduce fuel consumption by 19 percent.

BenefitsThe 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…
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Date Posted
02/09/2016

When link travel times posted on DMS are twice as long as typical travel times, drivers begin to favor alternate routes.

METHODOLOGYResearchers used an on-line survey to collect data on drivers' opinions relative to diversion route usage when dynamic message signs (DMS) show travel times that are longer than normal.…
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Date Posted
06/03/2013

In the Seattle metropolitan area, a network wide variable tolling system reduced the aggregate travel demand of a targeted study group; weekly vehicle miles traveled (VMT) decreased 12 percent and travel time decreased 8 percent.

FINDINGSThe study identified a number of changes in aggregate travel demand of participants.7 percent reduction in all vehicle trips per week.12 percent reduction in vehicle miles traveled (VMT) per…
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Date Posted
06/20/2011

In the Seattle metropolitan area the net benefits of a network wide variable tolling system could exceed $28 billion over a 30-year period resulting in a benefit-to-cost ratio of 6:1.

FINDINGSThe study identified a number of changes in aggregate travel demand of participants.7 percent reduction in all vehicle trips per week.12 percent reduction in vehicle miles traveled (VMT) per…
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Date Posted
06/20/2011

Evaluation data show that adaptive signal control strategies can improve travel times in comparison to optimized signal timing plans.

RESULTSSimulation results demonstrated that compared to optimized traffic signal timing plans, adaptive control algorithms can decrease travel time and improve traffic volume handling by…
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Date Posted
05/05/2008

Arterial information allows travelers to make more informed decisions.

Advanced Traveler Information Systems that provide both static and dynamic information on arterial roadway conditions offer benefits in customer satisfaction and improved efficiency. In surveys…
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Date Posted
01/19/2007

Deployment experiences document the importance of traveler information and list top sources of traveler information.

In Seattle, the following evaluation data were highlighted: 1) Top Sources of Traveler Information (percent of trips where information was consulted). En-route radio (56 percent). Pre-trip radio…
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Date Posted
01/19/2007

A before-and-after study found that transit patrons experienced a smoother and more comfortable ride when a transit signal priority system was implemented in Seattle, Washington.

SEATTLE, WASHINGTONIn the spring of 2000, the King County DOT implemented a 2.1 mile signal priority system on Rainier Avenue. The system used in-vehicle radio frequency transponders, roadside…
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Date Posted
04/10/2002
Taxonomy (ARC-IT) Transit Signal Priority (PT09)

Evaluation of several transit signal priority systems found decreased bus travel time variability by 35 percent, lowered bus travel times by 6 to 27 percent, reduced AM peak intersection delay by 13 percent, and decreased signal-related bus stops by

ANN ARBOR, MICHIGANIn 1996, a test was conducted in Ann Arbor, Michigan that investigated bus priority using green extensions, red truncation (with and without compensation), and skip phasing (…
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Date Posted
04/10/2002
Taxonomy (ARC-IT) Transit Signal Priority (PT09)

In Tucson, Arizona and Seattle Washington models indicated adaptive signal control in conjunction with transit signal priority can decrease delay for travelers on main streets by 18.5 percent while decreasing delay for travelers on cross-streets by 2

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.

FINDINGS (Throughput) Arterial Data for ATIS Integration Experiment This experiment modeled the integration of data from arterial loop detectors (along routes SR99 and SR522) with data provided by…
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Date Posted
06/15/2001

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 perce

FINDINGS (Mobility) ATIS Experiment The ATIS experiment attempted to capture the near-term impacts of increased utilization of various traveler information services such as Microsoft (TM) Sidewalk…
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Date Posted
06/15/2001

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 pe

FINDINGS (Energy and Environment) Arterial Data for ATIS Integration Experiment This experiment modeled the integration of data from arterial loop detectors (along routes SR99 and SR522) with data…
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Date Posted
06/15/2001

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.

Each deployment strategy was evaluated during various peak travel times. Thirty (30) different daily scenarios were modeled. The scenarios included weather impacts, incident patterns, and travel…
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Date Posted
06/08/2001

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 stop

Each deployment strategy was evaluated during various peak travel times. Thirty (30) different daily scenarios were modeled. The scenarios included weather impacts, incident patterns, and travel…
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Date Posted
06/08/2001

A simulation study in Seattle found that if 6 to 10 percent of travelers started using pre-trip traveler information during severe weather conditions, there would be a small positive impact on roadway system efficiency and mobility .

Notes: See also: Metropolitan Model Deployment Initiative Seattle Evaluation Report: Final Draft, May 2000. Impacts of Supplementing Web-Based Urban Freeway ATIS With Parallel Arterial Travel-Time…
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Date Posted
01/15/2001

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 perc

A modeling effort investigated the potential impact of coordinating traffic signal control between several jurisdictions along congested arterial corridors leading into Seattle. FINDINGSThe results…
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Date Posted
09/21/2000

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.

Modeling was used to estimate the potential impacts of incorporating arterial traffic flow information into an Advanced Traveler Information System used to provide freeway traveler information.…
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Date Posted
09/21/2000

In 1999, a study in Seattle, Washington indicated that participants who used traveler information devices including wrist watches, in-vehicle components, and portable computers found the information was useful for making travel decisions.

Notes: A full set of reports on the SWIFT project are available on the U.S. DOT's Electronic document library these include the Evaluation Summary, Architecture Study, Consumer Acceptance Study,…
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Date Posted
09/21/2000

A model found that coordinating fixed signal timing plans along congested arterial corridors leading into Seattle, Washington would help reduce the number of expected crashes by 2.5 percent and the frequency of fatal crashes by 1.1 percent.

A modeling effort was used to investigate the potential impacts of coordinating traffic signal control between several jurisdictions along congested arterial corridors leading into Seattle. FINDINGS…
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Date Posted
09/21/2000

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.

The responses of Seattle area travelers to the various ITS improvements undertaken during the MMDI project were evaluated using focus groups, mail-in questionnaires, and Web-based surveys. FINDINGS…
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Date Posted
09/21/2000

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.

Modeling was used to estimate the potential impacts of incorporating arterial traffic flow information into an Advanced Traveler Information System used to provide freeway traveler information. The…
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Date Posted
09/21/2000

Real-time travel information helps customers navigate around congestion and shows the public when agencies know about and are working to clear traffic problems.

Real-Time Travel Information Bellevue, Washington has a large arterial data collection infrastructure in place and wanted to develop a means of providing this information to the public for…
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Dynamic parking management strategies may improve the ability to find on-street parking, yield environmental benefits, and improve access to local businesses.

Dynamic Parking ManagementDynamic parking management attempts to manage demand for parking spaces through variable parking rates and dissemination of real-time parking availability information. The…
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Ensure Data from Multiple Sources Are Transformed into a Consistent Frame of Geographical and Temporal Resolution for Effective Data Fusion.

Ensure data from multiple sources are transformed into a consistent frame of geographical and temporal resolution. Data fusion of BSMs and other data sets will be a necessity in situations when…
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Date Posted
05/30/2023
Taxonomy (ARC-IT) Performance Monitoring (DM02)

To Build Credibility and Trust for Accessible Transportation Technologies, Address Needs in Application Interaction and Integration with Mobile Platforms before Deploying with Target Populations.

Address digital service delivery needs to build credibility and trust with the target population. Three emerging problems appeared with the mobile application related to digital service delivery,…
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Date Posted
03/08/2022

Focus on Meaningful Community Engagement, Investing Revenues, and Collecting High Quality Data to Make Congestion Pricing Equitable.

As cities increasingly turn to congestion pricing, ensuring equity in congestion pricing is a critical concern. To study this issue, a research team at the Institute of Transportation Studies at…
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Date Posted
01/25/2021
Taxonomy (ARC-IT) Road Use Charging (TM11)

When implementing congestion pricing, considerations must be made for the impact dynamic tolling will have on travel choice and behavior among a specific region and/or corridor’s travelers.

The Volpe National Transportation Systems Center conducted a demographic household traveler panel survey in Seattle (as well as another UPA site) as part of the evaluation of the UPA Program (Peirce…
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Date Posted
02/27/2017

Grow regional road pricing policies from individual projects and develop modeling tools that reflect a wide range of impacts.

The following key themes and lessons learned summarize the findings of a literature review and the documents referenced in Appendix B of the source report.   Grow regional road pricing…
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Date Posted
01/13/2012

Participate in truckers' meetings to advertise new freight advanced traveler information systems, communicate changes in existing systems, and obtain feedback from stakeholders.

Participate in truckers' group meetings to exchange information about traveler information systems. Much can be gained for state DOTs and local transportation agencies to participate in truckers'…
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Date Posted
03/23/2011

Develop a regional ITS architecture with a common data server to facilitate ITS integration in a region

The MMDI set in motion an aggressive schedule of ITS deployment in four regions: San Antonio, Phoenix, Seattle, and New York City metropolitan area (which included parts of three states, New York,…
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Date Posted
05/19/2010

Secure high level management support and broad participation throughout an organization during the implementation and operation of transit automatic vehicle location systems.

The synthesis included the findings of a literature review, agency survey responses, and case study telephone interviews with agency personnel involved in the development and operation of bus AVL…
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Date Posted
09/18/2009

Implement standardized procedures for sharing, accessing and storing transportation data across the enterprise.

Effective life-cycle management enables the unambiguous sharing of information between applications. The best practices related to ITS and sharing among applications assumes that a robust data…
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Date Posted
09/26/2007

Consider requirements definition and system design Issues for Archived Data Management Systems.

ADMS offer numerous potential benefits, including the ability to better evaluate system performance, plan for operations, and support future investment decisions. Washington State TRAC, for example,…
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Date Posted
06/27/2007

Consider the impact of different technical and design factors when making cost estimates for advanced parking management systems (APMS).

This study found a wide range in costs for the APMS projects at BWI airport, Seattle Center and Chicago Metra park-and-ride facilities (ranging from $250 to $800 per space). The factors that had the…
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Date Posted
06/27/2007

Ensure the long-term stability of an interagency incident management program by creating dependencies and by managing for leadership succession.

Formalizing the incident management effort existing in many cities into an incident management program can make incident management a core agency activity at senior executive levels and demonstrate a…
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Date Posted
06/30/2006

Solicit executive support for an incident management program, but rely on staff-level champions and administrative support for day-to-day guidance of the program.

While no single approach can be prescribed for all incident management efforts, a flexible framework based on experiences from successful incident management programs in the United States can be…
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Date Posted
06/30/2006

Coordinate across jurisdictions/regions and share resources to reduce future costs and delays.

There is some form of incident management activity in most major and many mid-sized urban areas. Typically this involves each agency carrying out its own responsibilities, with primarily working-…
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Date Posted
06/30/2006

Take advantage of time-specific opportunities to organize and build support for a formal incident management program.

The Regional Traffic Incident Management Programs: Implementation Guide aims to explain general steps to implementation (with an institutional, rather than technical, focus), and is based on…
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Date Posted
06/30/2006

Develop written policies that delimit the use and distribution of data.

The value of the MDI operations lay in the data that is generated by the equipment and systems involved. Data policy issues that have been reviewed and tackled by the MDI partners include resolving…
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Date Posted
10/12/2005

Install Automatic Vehicle Location (AVL) technology to greatly enhance transit agency performance.

Installation and use of Automatic Vehicle Location (AVL) technology can greatly enhance transit agency performance. Operations and emergency response are enhanced, operational data can be captured to…
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Date Posted
09/16/2005

Analyze system performance beyond traditional notions of average conditions to reveal impacts of various combinations of ITS and infrastructure elements and be sure to choose appropriate performance measures to fully understand theses impacts.

Choose an appropriate method of analysis when considering an ITS project in the planning process. Analyze system performance beyond traditional notions of “average” conditions to reveal important…
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Date Posted
09/16/2005

Implement a communication structure across jurisdictions that facilitates the flow of traffic data and allows agencies to coordinate traffic signal timing.

Develop a cross-jurisdictional communications infrastructure that allows jurisdictions to share real-time traffic operations information and update signal plans. The idea of a multi-jurisdictional…
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Date Posted
09/16/2005

Facilitate the participation of private sector technology companies in the deployment of ITS by using creative approaches to address the assignment of intellectual property rights.

Address intellectual property rights issues and questions of ownership of software and technology developed or enhanced during the course of the project through creative approaches. For example:…
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Date Posted
09/16/2005

Understand the market during the development of an Advanced Travel Information System (ATIS) to reduce project development uncertainty and produce a more functional end product.

During the SWIFT project, a number of institutional issues were encountered that affected the deployment of project. One issue related to the end users of the devices being tested. The lessons…
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Date Posted
09/16/2005

The cost to equip 10 intersections with dedicated short range communications (DSRC) was estimated at $70K to $80K in the Seattle area.

Content references source material no longer available at its original location.
This presentation provided cost estimates for the implementation of hardware, software, and engineering activities for vehicle-to-infrastructure (V2I) communication systems installed at 10…
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Made Public Date
09/18/2019

In the Seattle metropolitan area, a network wide variable tolling system would cost roughly $749 million to implement and $288 million to operate each year.

In the Seattle metropolitan area, a congestion pricing project was conducted to examine the driving behavior of 275 volunteer households who had vehicles equipped with GPS tolling meters similar to…
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Made Public Date
10/30/2011

Value pricing projects conducted in three metropolitan areas indicated the costs to convert HOV lanes to HOT lanes ranged from $9 million to $17.9 million.

This research synthesized evaluation findings from 24 projects sponsored by the Federal Highway Administration (FHWA) Congestion and Value Pricing Pilot Program (VPPP) between 1991 and 2006.…
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Made Public Date
02/02/2010

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

The Federal Highway Administration (FHWA) conducted a study to explore the potential benefits and costs of fully deploying ITS operational strategies in large, medium, and small metropolitan areas.…
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Made Public Date
09/26/2008
Taxonomy (ARC-IT) Traffic Information Dissemination (TM06), Integrated Decision Support and Demand Management (TM09), Traffic Signal Control (TM03), Commercial Vehicle Parking (CVO05), Border Management Systems (TM23), Electronic Clearance (CVO03), Smart Roadside and Virtual WIM (CVO08), Intelligent Access Program - Weight Monitoring (CVO18), Roadside CVO Safety (CVO07), In-Vehicle Signage (TI07), Standard Railroad Grade Crossing (TM13), Advanced Railroad Grade Crossing (TM14), CV Driver Security Authentication (CVO14), Freight Administration (CVO02), Electronic Work Diaries (CVO16), Intelligent Speed Compliance (CVO19), Transit Fare Collection Management (PT04), Emergency Call-Taking and Dispatch (PS01), Emergency Vehicle Preemption (PS03), Vehicle Emergency Response (PS05), Incident Scene Pre-Arrival Staging Guidance for Emergency Responders (PS06), Disaster Response and Recovery (PS12), Broadcast Traveler Information (TI01), Emissions Monitoring (ST01), Eco-Traffic Metering (ST03), Traffic Metering (TM05), Reduced Speed Zone Warning / Lane Closure (VS09), Personalized Traveler Information (TI02), Work Zone Management (MC06), Traffic Incident Management System (TM08), Roadway Service Patrols (PS08), Infrastructure-Based Traffic Surveillance (TM01), Transit Vehicle Tracking (PT01), Transit Signal Priority (PT09), Transit Security (PT05), Maintenance and Construction Activity Coordination (MC08), Regional Traffic Management (TM07), Management of Electronic Traffic Regulations (METR) (VS17), Weather Information Processing and Distribution (WX02), Personnel Device Maintenance (SU13), Trip Planning and Payment (TI04)

Advanced parking management systems cost between $250 and $800 per parking space to install.

In 2006, the Federal Highway Administration sponsored a study to evaluate the deployment of advanced parking management systems (APMS) at six parking facilities. In-depth profiles were prepared for…
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Made Public Date
04/21/2008

Based on information from 18 agencies worldwide, the costs of real-time bus arrival information systems vary depending on AVL technology, fleet size, and provisioning of real-time information.

This TCRP synthesis report presents information on the state of the practice in real-time bus arrival information systems based on literature research and survey of transit agencies in the United…
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Made Public Date
06/01/2004

An advanced parking information system was deployed as part of the Seattle Metropolitan Model Deployment Initiative for $925,000; maintenance costs of the system hardware were estimated at 7% of the hardware capital costs.

The Seattle Center Advanced Parking Information System, in Seattle, Washington, provides information and routing directions to three major parking centers via variable message signs (VMS). This…
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Made Public Date
12/10/2003

The total capital cost of the Seattle MMDI emergency operations centers project including equipment and planning/development costs were $151,700; O&M costs were approximately 5% of the equipment costs.

The lack of integrated communication links between Seattle area emergency operations centers (EOCs) was discussed at a series of workshops and meetings during the Seattle MMDI project deployment. As…
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Made Public Date
11/20/2003

Bus tracking capability was added to the Metro Online Web site as part of the Seattle Metropolitan Model Deployment Initiative at a cost of $333,000.

BusView is a component of Metro Online, a King County, Washington transit website that shows real-time bus location on a map for selected bus routes. Bus location data is provided by the King County…
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Made Public Date
11/07/2003

Software development was the key cost driver for the bus arrival and departure information system deployed as part of the Seattle Metropolitan Model Deployment Initiative.

Transit riders at Bellevue and Northgate Transit Centers in King County, Washington were provided with bus arrival/departure times, bay number, and expected actual departure times for all bus routes…
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Made Public Date
11/07/2003

Nineteen metropolitan North Seattle, Washington city signal systems were integrated at a cost of $1,755,000.

The North Seattle Advanced Traffic Management System (ATMS) was enhanced to allow the integration of 19 metropolitan North Seattle, Washington, city signal systems. The enhancement also included…
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Made Public Date
09/30/2003

A variable speed limit system consisting of multiple ITS components and covering 40 miles over the Snoqualmie Pass in Washington was designed and implemented for $5 million.

The Washington State Department of Transportation (WSDOT) deployed a variable speed limit (VSL) system to improve safety and reduce winter-weather related accidents on a 40-mile stretch of I-90 over…
Content type
Made Public Date
09/30/2003