CCTA Planning

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East County Integrated Transit Study

Since Highway 4 has been significantly upgraded, access to the eastern part of Contra Costa County (East County), which includes the cities
of Antioch, Brentwood, Discovery Bay, Oakley, Pittsburg, and the unincorporated areas, has been improved. CCTA now wishes to enhance
transportation options with a $775,000 grant received from the California Department of Transportation (Caltrans) to evaluate the need for
and current state of connections to BART, rail, and ferry services.
Read more

Monument/I-680 Bicycle and Pedestrian Improvement Study

CCTA is working with the TRANSPAC Committee to develop a feasibility study to identify specific improvements to the bicycle and pedestrian connections on the Monument Boulevard Corridor across I-680. This is a heavily-traveled roadway, including high-speed freeway ramps, with minimal facilities for non-motorists.

This gap in the active transportation network was identified in the Countywide Bike Plan, and would provide for an improved east-west connection between Pleasant Hill and Concord across I-680. The study area includes Monument Blvd. between Mohr Lane/Iron Horse Trail and Contra Costa Blvd. and includes other equivalent parallel routes used to travel and access this section of the Monument Corridor.

Tri-Valley Hub Network Integration Study

The Tri-Valley Hub Network Integration Study serves as a critical next step towards the strategic goal for a future Tri-Valley Hub, as outlined in the 2018 California State Rail Plan. The future Tri-Valley Hub will serve as an inter-regional connection between multiple counties and host a robust suite of transit options.

The State Rail Plan identified the need for a hub station in the Tri-Valley region (location to be determined), allowing for easy transfers for north-south and east-west travel demand. This study will develop a framework to connect proposed integrated express bus service on I-680, I-580, BART, and other future and existing regional rail services at the Tri-Valley Hub.

Corridor System Management Plans

As part of the passage of Proposition 1B in November 2006, the Corridor Mobility Improvement Account (CMIA) was created by the California Transportation Commission (CTC). The CTC requires Caltrans to develop Corridor System Management Plans (CSMPs) for highway corridors containing projects slated to receive CMIA funds. CSMPs are designed to identify ways to increase transportation options, improve system efficiency, and reduce congestion in some of the State’s most challenging travel corridors. In Contra Costa County, three CMIA-funded projects have spurred the generation of CSMPs: Caldecott Tunnel Forth Bore (SR-24), I-80 Integrated Corridor Mobility Project (I-80 West) and SR-4 East Widening Project (SR-4). CSMP fact sheets, executive summaries, and full reports are posted on Caltrans’ Corridor Mobility website, as they become available.

Interstate 680 Transit Investment and Congestion Relief Options Study

The I-680 Transit Investment and Congestion Relief Options Study was initiated in April 2015 and finalized in December 2015. The primary purpose of the Study was to define and evaluate potential transportation investment options that could reduce traffic congestion and encourage transit ridership on the I-680 corridor in the general area from the Benicia-Martinez Bridge to State Route-84 with a focus on potential transit service improvement options between Walnut Creek and Dublin.

The study evaluated five possible options, including:

  • BART
  • Light Rail Transit
  • Ultra Light Rail Transit
  • Bus Transit
  • Connected Vehicle/Autonomous Vehicle (CV/AV) Support

Following an evaluation of each option, the study identified the most feasible and financially viable project as a combination of enhanced express and local bus service, connected vehicle and automated vehicle support in the corridor, and active traffic management. This includes new park and ride lots in the corridor, known as Smart Mobility Hubs, and use of the shoulders of I-680 for bus operations. Links to the executive summary and full study are found below.

State Route 239 Corridor Study

SR-239 is a legislatively approved, but unconstructed route in the California state highway system. The purpose of this study is to determine the ultimate concept and alignment for the route in the context of the regional transportation network that includes part of three counties: Contra Costa, San Joaquin and Alameda. This route has the potential to provide improved regional connectivity, job realization, congestion relief, and roadway safety & emergency access. Contra Costa County was awarded $14 million for initial study and planning under SAFETEA-LU in 2005. Administration of the study, now called TriLink, was transferred to the Contra Costa Transportation Authority (CCTA) in January 2012.

To visit project website click here.

West County High Capacity Transit Study

Interstate 80 is one of the most congested corridors in the Bay Area, and the Richmond BART line often reaches full capacity during commute hours. The West County High-Capacity Transit Study is evaluating options for major transit investments in the I-80 corridor of West Contra Costa County. The Study is focused on rapid and direct services that can attract new riders among the 250,000 residents of West County and can be a competitive alternative to driving. The ultimate goal of the Study is to identify one or more projects to improve high-capacity transit in West County, expand alternatives to driving on congested streets and highways, and improve regional air quality and quality of life. The Study is jointly funded by CCTA, BART, MTC and WCCTAC, who is also overseeing the effort.

Community-Based Transportation Plan Program

The Contra Costa Transportation Authority (CCTA) is conducting a series of Community-Based Transportation Plans (CBTPs) to identify transportation improvements that will address the transportation needs of economically disadvantaged communities throughout Contra Costa.  The CBTPs will help to identify projects and programs that will improve the quality of life for people living and working in and around the following four project study areas which have been identified by MTC as “Communities of Concern”: 1) Pittsburg/Bay Point, 2) Concord (Monument Corridor), 3) Richmond Area, and 4) Martinez. 

For details about the individual CBTPs, please click on the corresponding study area found below.


Final 2017 Countywide Transportation Plan (CTP) Adopted by CCTA on September 20, 2017. 

The CTP provides the overall direction for achieving and maintaining a balanced and functional transportation system within Contra Costa County while strengthening links between land use decisions and transportation. It outlines the Contra Costa Transportation Authority’s vision for Contra Costa and establishes goals, strategies, projects, and actions for achieving that vision.

On September 20, 2017 the Authority adopted the Final 2017 CTP Update. The 2017 CTP comprises two volumes:

  • Volume 1 provides the Vision, Goals, and Strategies; a review of issues facing our transportation system; an overview of the cooperative planning process in Contra Costa; and an implementation plan for meeting our transportation goals.
  • Volume 2 contains a summary of the Action Plans, along with a performance and equity evaluation of major projects, those costing more than $25 million. 

These documents, along with the Draft Environmental Impact Report can be downloaded below and more information on both items can be found at and the Environmental Impact Report section.

Countywide Bicycle and Pedestrian Plan

As the Congestion Management Agency for Contra Costa, CCTA has always strived to provide the best travel network for its cyclists and pedestrians. To make these modes equitable, accessible, safe and enjoyable for all residents and visitors, CCTA recently updated the 2009 Countywide Bicycle and Pedestrian Plan (CBPP) to harmonize local plans for bicycle and pedestrian networks, and to better understand where and how often people walk and cycle within Contra Costa. 

View the full plan.

Action Plans

As part of the 2017 update of the Countywide Comprehensive Transportation Plan (CTP) the Regional Transportation Planning Committees (RTPCs) updated their Action Plans for Routes of Regional Significance. The Action Plans are intended to establish quantitative service objectives by which we can gauge the progress of our transportation system and assess the impacts of landuse decisions on the regional transportation system. Each Action Plan identifies a system of Regional Routes –  those freeways, arterials and other facilities that provide the main connections among Contra Costa’s communities and to the surrounding areas. The Action Plans help local jurisdictions meet the requirement of the Measure J Growth Management Program (GMP) that requires local jurisdictions to participate in a cooperative, multi-jurisdictional planning process.

Each Actions Plan includes:

  • Long-range assumptions regarding future land use based on local general plans, consistent with regional forecasts
  • Overarching goals that articulate CCTA’s vision for the future
  • Adopted Multi-modal Transportation Service Objectives (MTSOs) that use a quantifiable measure of effectiveness and include a target date for attaining the objective
  • Specific actions to be implemented by each participating jurisdiction
  • Requirements for consultation on environmental documents among participating localities
  • Procedure for review of impacts resulting from proposed local General Plan amendments that have the potential to influence the effectiveness of adopted Action Plans

The RTPCs developed the first Action Plans in the early 1990s and updated them in 1999-2000 and 2009. To view the final 2017 updates to the Action Plans  please click below.

Environmental Impact Report (EIR)

On September 20, 2017, CCTA certified the Final EIR for the 2017 Countwide Transportation Plan (CTP). The Draft EIR was released on June 16, 2017. The comment period on the Draft EIR was open until August 1, 2017. Following the close of the comment period, CCTA prepared the responses to comments which were distributed to all commenters on September 1, 2017. 

The EIR evaluated the Long Range Transportation Program (LRTIP) in the 2017 CTP. The LRTIP consists of $6.447 billion in multi-modal projects and programs.

In addition to the No Project alternative the Draft EIR evaluates two alternative investment options as well as the projects in the Regional Transportation Plan (RTP) prepared by the Metropolitan Transportation Commission (MTC).

The Final EIR can be downloaded here chapter by chapter. The combined document can be downloaded by visiting the 2017 CTP Update website at


The overall goal of the Growth Management Program (GMP) is to “achieve a cooperative process for Growth Management on a countywide basis, while maintaining local authority over land use decisions and the establishment of performance standards.” One of the key principles underlying growth management is to ensure that “future residential, business, and commercial growth would pay for the facilities required to meet the demands resulting from that growth,” while sales tax revenues would be used to alleviate existing congestion.

The GMP has made real improvements in managing growth in Contra Costa County. Most importantly, the GMP:

  1. Gives local jurisdictions several new forums in which they cooperate to address transportation land use issues, and develop joint objectives and plans to achieve them.
  2. Creates a regional mitigation program that, through the imposition of new transportation fees, has generated almost $250 million to fund improvements needed to meet the demands resulting from growth.
  3. Subject local land use decisions and actions on jobs and housing to increased scrutiny by the public and adjoining jurisdictions. The Growth Management Implementation Guide sets forth the procedures for review of General Plan amendments and development projection accordance with the Cooperative Planning requirements of Measure J. 
  4. Provides a consistent set of tools and performance standards for streets and public services under which projects and changes to general plans are thoroughly evaluated.

To learn more about the GMP, please click here.


Besides being responsible for the Measure J Growth Management Program (GMP), CCTA serves as the Congestion Management Agency (CMA) for Contra Costa County. As the CMA, the CCTA plays several roles: it prepares a Congestion Management Program (CMP) and update it every two years; it adopts and updates a Priority Development Area (PDA) strategy; and it helps develops regional plans and allocates regional funding.


The CMP outlines a CMA’s strategies for managing the performance of the regional transportation within its county. Each CMP must contain several components:

  • Traffic level-of-service standards for State highways and principal arterials
  • Multi-modal performance measures to evaluate current and future system
  • A seven-year capital program of projects to maintain or improve the performance of the system or mitigate the regional impacts of land use projects
  • A program to analyze the impacts of land use decisions
  • A travel demand element that promotes transportation alternatives to the single-occupant vehicle

One of the key benefits of being a CMA is that it gives the county a “place at the table” in discussions with other counties and regional and State agencies and provides a cooperative process for allocating various transportation funds.

View the 2019 Final CMP here

View the Full 2019 CMP with Appendices here



The PDA Strategy lays out the criteria for selecting projects that support Plan Bay Area, the regional transportation plan developed by the Metropolitan Transportation Commission, or MTC. PDAs are areas within existing communities that local city or county governments have identified and approved for future growth and the PDA Strategy outlines the policy the CCTA will use to support the development of PDAs in Contra Costa.

Download the 2017 Contra Costa PDA Strategy. The CCTA will report on the implementation of the PDA Strategy in April 2019.


CCTA maintains several tools to support its transportation planning and growth management activities. CCTA also makes these tools available to local jurisdictions and agencies to support their planning efforts. These include:

  • The Countywide Travel Demand Model – providing traffic forecasts through the year 2030.
  • Technical Procedures – to assist local staff and consultants in conducting traffic impact studies, developing Action Plans for Routes of Regional Significance, and assessing level of service on Basic Routes.
  • Comprehensive Transportation Project List (CTPL) – a comprehensive database of current and proposed transportation projects.
  • Land Use Information System (LUIS) – a database of local demographic information available at the Traffic Analysis Zones (TAZ) level.
  • System Monitoring – reports on how the transportation system is operating, including the monitoring of Multi-Modal Transportation Service Objective (MTSO) and the Congestion Management Program (CMP) network. 

These tools are designed to support both CCTA and local jurisdiction activities. CCTA will use these tools to develop its updates to the Countywide Comprehensive Transportation Plan (CTP) and the implementation of Measure J as well as in more detailed corridor and project studies. Local agencies also use this information in the analysis of general plan amendments and major developments.

Comprehensive Transportation Project List (CTPL)

To support its planning, programming and modeling efforts, CCTA maintains a database of transportation projects called the Comprehensive Transportation Project List (CTPL). This database lists transportation projects for which jurisdictions and agencies are seeking federal or State funding.

CCTA has used the CTPL to create the required seven-year Capital Improvement Program (CIP) for the Congestion Management Programs (CMPs) and to define the “universe of projects” used in the Countywide Comprehensive Transportation Plan (CTP). More recently, CCTA used the CTPL to support the decennial update of its travel demand model and the Countywide Bicycle and Pedestrian Plan (CBPP).

The database now contains over 1,200 projects in both Contra Costa and the Tri-Valley portions of Alameda County. The CTPL includes the location of the projects, the project type, project sponsor, a short description and costs and funding (where available).

If you are staff of a project sponsor and would like a user name and password so you can make these edits, please contact Matt Kelly, Senior Transportation Planner, by phone at (925) 256-4730 or by email at

Travel Demand Model

Both the Measure C Growth Management Program (GMP) and the State congestion management legislation require CCTA to develop and maintain a travel demand model. These models use information on current and future population and employment, transit ridership, expected roadway improvements, and observed travel behavior to forecast traffic on the regional transportation system. The travel demand model is used in several ways: 

  • Local agencies use it to analyze the effects of new development and changes in their general plans. 
  • Various agencies, including CCTA and Caltrans, use it to analyze the effects on new transportation improvements. 
  • CCTA uses the model to analyze the effects of its plans and programs, including the Countywide Comprehensive Transportation Plan (CTP) and the Congestion Management Program (CMP). 

CCTA’s Decennial Model Update, completed in 2003, represents a major upgrade in modeling capabilities. The new model adds greater detail, in both the number of traffic analysis zones and the extent of the transportation network included, and is now integrated with geographic information systems, improving the geographical accuracy and display capabilities of the model.

For more information on the Travel Demand Model, please click here.

Land Use Information System (LUIS)

Estimates of land use and demographics, both current and future, are essential parts of travel forecasting. CCTA maintains a detailed database of land use and demographics, known as the Land Use Information System (LUIS), for use in its Countywide Travel Demand Model.

The LUIS lists the existing and forecast number of households and jobs by Traffic Analysis Zones (TAZs). CCTA developed these detailed forecasts from census-tract-level forecasts prepared by the Association of Bay Area Governments (ABAG). ABAG usually prepares a new set of forecasts every other year and CCTA uses those forecasts to update the LUIS. The LUIS then goes through extensive local review to refine the forecasts to better correspond to expected growth in the different parts of the county.

CCTA’s Countywide Travel Demand Model is currently based on ABAG’s Projections 2013 and incorporates considerable refinements from local jurisdictions. Forecasts are available for the years 2010, 2020, 2030 and 2040. CCTA is transitioning to ABAG’s Projections 2017 (P-2017), based on the land use inputs for the Bay Area’s Sustainable Communities Strategy (SCS), part of Plan Bay Area 2040 – the current Regional Transportation Plan (RTP).

The summary tables are available which contain the households and jobs forecasts for cities, towns and unincorporated areas within Contra Costa and the Alameda County portions of Tri-Valley for the LUIS data.

System Monitoring

As part of its transportation planning and growth management responsibilities, CCTA periodically monitors the performance of the transportation system in Contra Costa. Two of the main efforts are the monitoring of the Multimodal Transportation Service Objectives (MTSOs) in the Measure C Growth Management Program (GMP) as part of updates of the Action Plan for Routes of Regional Significance and the Countywide Comprehensive Transportation Plan (CTP), along with the monitoring of level-of-service standards as part of the Authority’s biennial Congestion Management Program (CMP).  

Multi-Modal Transportation Service Objectives (MTSO) 
CCTA monitors the achievement of the objectives for Regional Routes established in the Action Plans and the CTP as part of the periodic update of those plans. The most recent monitoring of these objectives was conducted in 2013. For the full 2013 MTSO monitoring report including appendices, please click here. For the 2013 MTSO Monitoring Report only, please click here.  

CMP Level-of-Service Standards
CCTA has monitored the achievement of the level-of-service standards established in the CCTA’s CMP since the first CMP in 1991. To download the most recent CMP monitoring report, please click here. Earlier reports can be reviewed at the CCTA’s offices.

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