511 Contra Costa is your 411 on transportation

Looking for everything you need to know about transportation in Contra Costa County? 511 Contra Costa is your resource. We provide vehicle trip reduction encouragement campaigns and services for commuters and residents who need a nudge to explore the use of multiple modes of travel.  511 Contra Costa will help you plan a bike route, navigate the plethora of public transit options, take advantage of the HOV lanes and HOT lanes, and finding the best rideshare program whether it be the traditional employer based program or the dynamic ridesharing options including Uber, Lyft, Carma, and more.

Use our comprehensive transit maps or the 511.org Trip Planner to find your way around the various public transportation agencies in our area. Need to find your nearest Park & Ride lot, or help a friend plan a trip from Santa Barbara to Martinez via train? Are you mapping a bike route to work and want to know more about avoiding hills or how you can make your workplace more bike friendly? Whether you’re a cyclist, a commuter, a business owner, or a parent of school-aged children, 511 Contra Costa has you covered.

What we’re all about

511 Contra Costa is a comprehensive Transportation Demand Management (TDM) program that promotes alternatives to the single occupant vehicle. We encourage what we call “green commutes” via the utilization of alternative modes of transportation that eliminate traffic congestion and improve air quality by maximizing the use of our entire transportation network. Commute options include carpooling, vanpooling, telecommuting, biking, public transit, and walking.


We’re sponsored by all twenty jurisdictions in Contra Costa County (California) through the four regional transportation planning committees: SWAT (Southwest county), TRANSPAC (Central county), TRANSPLAN (East county), and WCCTAC (West county).


Funding for 511 Contra Costa programs are provided primarily by the Bay Area Air Quality Management District’s Transportation Fund for Clean Air and the local half-cent sales tax, known as Measure J, approved by voters in in 2004 and administered by the Contra Costa Transportation Authority. A portion of our Employer Outreach services and programs are funded by the Metropolitan Transportation Commission’s Congestion Mitigation Air Quality funds.

For more about our efforts and results, check out our 511 Contra Costa Quick Facts page.

Contact us

Phone: 925.969.0841 ext. 204
Email: support@511contracosta.org
Tips: tips@511contracosta.org
Snail mail: P.O. Box 23675, Pleasant Hill, CA 94523

Find your local 511 Contra Costa office

(serving the regional transportation planning committees of TRANSPAC and TRANSPLAN)

Represents the cities of Clayton, Concord, Pleasant Hill, Martinez, Walnut Creek, Antioch, Brentwood, Oakley, Pittsburg, and unincorporated areas of central and eastern Contra Costa. Project oversight includes:

Program Manager: Lynn Overcashier
Email: lynn@511contracosta.org
Snail mail: P.O. Box 23675, Pleasant Hill, CA 94523
Oversight committee websites: TRANSPAC and TRANSPLAN

(serving the regional transportation planning committee of SWAT)

Represents the cities of Lafayette, Orinda, San Ramon, Danville, Moraga, and unincorporated areas of southwest Contra Costa. Project oversight includes:

Program Manager: Darlene Amaral
Phone: 925.973.2655
Email: damaral@511contracosta.org
Snail mail: 2401 Crow Canyon Rd, San Ramon, CA  94583
Oversight committee website: SWAT

(serving the regional transportation planning committee of WCCTAC)

Represents the cities of El Cerrito, El Sobrante, Hercules, Kensington, Pinole, Richmond, Rodeo, San Pablo, and other unincorporated areas of western Contra Costa. Project oversight includes:

Program Manager: Danelle Carey
Phone: 510.210-5932  Note: office is closed Fridays, Saturdays, and Sundays
Email:  dcarey@wcctac.org
Snail mail: 6333 Potrero Avenue, El Cerrito, CA 94530
Oversight committee website: WCCTAC


Bay Area Air Quality Management District Contra Costa Transportation Authority


See a list of our publications


See a list of our RFPs and RFQs