Twenty years of moving Massachusetts.
Green Streets Initiative has been helping people shift trips to healthier, cheaper, cleaner alternatives since 2006 — and measuring the impact, trip by trip, community by community.
Green Streets Initiative was founded in Cambridge in 2006 by Janie Katz-Christy, who spent two decades building one of the state's most trusted active transportation organizations. What started as a community-focused advocacy and programming effort grew into a multi-city platform running Walk/Ride Days, What Moves Us storytelling campaigns, and employer and school programs across Massachusetts.
In 2026, GSI enters a new chapter. With Janie's founding vision as the foundation, we're relaunching around Shift — a behavior change platform that makes active transportation measurable, competitive, and rewarding. The programs that made GSI trusted for twenty years now run on technology that scales.
Green Streets Initiative helps people shift trips to healthier, cheaper, cleaner alternatives — and measures the impact, trip by trip, community by community.
Four programs, one mission.
Shift
The behavior change app that makes every active trip count.
Learn moreShift for Schools
Classroom-level active transportation competitions for K–8 schools.
Learn moreWhat Moves Us
Community storytelling campaigns that give commuters a voice in transportation planning.
Learn moreWalk/Ride Days
Monthly active commuting events across Massachusetts since 2006.
Learn moreThe people behind GSI.
Staff
Janie Katz-Christy
Founder, Green Streets Initiative
Twenty years building active transportation programming across Massachusetts.
Keith Anderson
Director
Leading GSI’s relaunch around the Shift platform.
Board of Directors
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