New GreenTRIP Parking Database provides new tool to build smarter, low-traffic communities

FOR IMMEDIATE RELEASE: September 18, 2014

CONTACT: Shannon Tracey, 510-338-2937 or [email protected]


Starting today, Bay Area planning professionals and community members who want to understand how much parking is really needed for new housing developments have an exciting new tool in their toolbox: the GreenTRIP Parking Database.

The GreenTRIP Parking Database is a first-of-its-kind online map-based tool that will help reveal how innovative transportation strategies, such as free transit passes and on-site car-sharing, impact actual use of parking.  The database is a powerful resource that anyone can use to build smarter, low-traffic multi-family residential buildings.

Parking is an extremely expensive component of developing new housing.  A single parking space can cost anywhere from $20,000-$80,000 – costs that are passed on to residents in rents or home prices, and that can limit the number of affordable homes included in projects.  The combined empty parking spaces counted in the 68 sites alone cost nearly $140 million.

Figuring out the right amount of parking, and making it easier for residents to get around without a car in the first place, can save money for everyone – developers and residents – while reducing traffic impacts to the larger community.

Building on the success of TransForm’s GreenTRIP Certification program, the GreenTRIP Parking Database provides information to help achieve our vision of a Bay Area where homes are more affordable, our communities are safer and more pleasant, and it’s easy for everyone to get where they need to go.

The information in the GreenTRIP Parking Database offers real life data on how much parking is actually being used at residential developments that employ different sets of innovative transportation strategies.  Planners, developers, and community members can learn from these existing residential developments, to inform decisions about transportation and parking for future developments.

Users can utilize the GreenTRIP Parking Database to compare sites based on what kind of traffic reduction strategies are used, location type, affordability, public transportation access, and other qualities.  The database includes a customizable Comparison Report that allows anyone to create a “do-it-yourself parking study” and export or print the results.

The GreenTRIP Parking Database includes data from 68 multi-family residential sites around the Bay Area.  Researchers conducted parking counts at peak parking time, during the hours of midnight to 5:00 a.m. when most residents are home and sleeping.  More sites will be included as additional data is collected, with a target completion date of early 2015.

This is just the first step towards empowering communities with tools to help them build housing that helps make thriving neighborhoods with great transportation choices more available and affordable.  GreenTRIP Connect, which will begin development in 2015, will provide an even more powerful tool to model parking demand for future residential developments. 

GreenTRIP Connect has received initial funding from the Knight Foundation, but is currently looking for additional matching funding to bring this effort to life.

To view and use the GreenTRIP Parking Database, visit

To learn more about GreenTRIP, including how to support GreenTRIP Connect, visit