An incredibly sad moment for the entire LivableStreets community as we mourn the loss of Louisa Gag.

On the morning of Thursday, July 9, we lost one of our own, Louisa Gag, when she was struck and killed by a person driving a vehicle.

This is an unimaginable loss for her family and friends and the entire community.

Louisa worked at LivableStreets for five years before she joined the transportation department in the City of Boston.

She was a cherished member of our team. To even attempt to list her incredible achievements feels hollow. We could tell you that she led our vision zero work or that she authored our first Go Boston 2030 accountability report or about the myriad of other contributions to making our streets safer, but it would not do her justice.

It's not just what she did but it's how she did it. It's how she showed up in the world: a compassionate changemaker with a collaborative spirit who had an unbounded capacity to envision a better future. She was a constant source of inspiration as an advocate, colleague, and friend.

The legacy of her impact can be felt in the fabric of the city that she has meaningfully helped shape and the many people her life and work has touched.

We know at the moment you want action, and we do too. We are working with Louisa’s family and our partners in the Vision Zero Coalition to make sure that we take space to mourn this unimaginable tragedy and move forward in the way Louisa would want us to - with clarity, purpose and urgency.

For now, if you have a memory of Louisa or a note of gratitude for all that she did, please send to [email protected]

BIKE CONVOYS: Groups across the region are planning bike convoys to the vigil. Monitor the Massachusetts Vision Zero Coalition webpage for more information.

Open letter from Mayor Wu (July 24, 2026)

WBUR (July 24, 2026): Wu delivers promised street safety plan, as outcry over cyclist death keeps up

Boston Globe Editorial (July 17, 2026): Louisa Gag’s death demands a full investigation — and an end to Wu’s slowdown on bike lanes

Boston Globe (July 16, 2026): Hundreds gather at the vigil for Louisa Gag remembering her dream to make Boston's streets safer

Boston Globe (July 16, 2026): Driver in fatal cyclist crash maneuvered around another vehicle

WGBH (July 15, 2026): Biking advocate Louisa Gag's death is renewing calls for more safety action from Boston officials

Boston Globe (July 15, 2026): Wu, City Hall remain reticent on key details in crash that killed Boston transit planner

Boston Globe (July 14, 2026): Louisa Gag, cyclist fatally struck in Boston, recalled in obituary as a ‘beacon of kindness’

Boston Globe Letters to the Editor (July 14, 2026): "City bike advocate’s fatal crash is a tragedy hard to fathom; The Dutch take a proactive, systematic, and swift approach to road safety." (by Jeff Rosenblum, co-founder LivableStreets, and Peter Furth, Professor Northeastern University).

WGBH (July 13, 2026): ‘We know that these are preventable’: Friends mourn bike advocate Louisa Gag, killed by driver

Boston Herald Editorial (July 13, 2026): "The time for safe streets in Boston is now"

Boston Globe (July 13, 2026): "‘More than just a cyclist’: Hundreds mourn Boston transit planner killed while biking"

By Alan Wirzbicki, Globe Opinion Staff (July 13, 2026): "As friends remember Louisa Gag, will her death lead to changes?"

Boston Globe (July 10, 2026): ‘Systemic failure’: Crash that killed Boston transit planner sparks furor over road safety efforts

StreetsBlog Mass (July 10, 2026): Louisa Gag, Longtime Street Safety Advocate, Identified as Thursday’s Homicide Crash Victim

WCVB (July 10, 2026): Roslindale mourns loss of Louisa Gag, city worker and pedestrian safety advocate

Boston 25 News (July 9, 2026): ‘Heartbroken’: Cyclist fatally struck in Boston identified as member of Mayor Wu’s staff

Boston Globe (July 9, 2026): Boston transportation planner fatally struck by car near Roxbury Crossing, family says

(Above credited to Sasha Pedro)

(Above credited to Sasha Pedro)