Critical Mass on Eight Wheels

Streetfilms looks at the livable streets movement in Paris and a twice-weekly "critical mass" over roller skaters that often brings crowds of thousands.

1 minute read

April 26, 2008, 5:00 AM PDT

By Nate Berg


"Every Friday night and Sunday afternoon Parisians can take the streets and see their city on skates. And they do, by the thousands! Both mass rides, which are sponsored by different associations, started small and now are institutions of public street life in Paris."

"A little history: The Friday night skates were started by a small group of friends. After the transit strikes in 1995, which forced Parisians to find a new way to get around town, thousands of people began to show up on Friday evenings just to practice moving through the city on roller blades. The numbers inspired Pari Roller to form an official association working with Paris', and the world's, first roller blade national police unit."

Thursday, April 24, 2008 in Streetsblog

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 30, 2025 - Diana Ionescu

Close-up on Canadian flag with Canada Parliament building blurred in background.

Canada vs. Kamala: Whose Liberal Housing Platform Comes Out on Top?

As Canada votes for a new Prime Minister, what can America learn from the leading liberal candidate of its neighbor to the north?

April 28, 2025 - Benjamin Schneider

Hot air balloons rise over Downtown Boise with the State Capitol building visible amidst the high rises.

The Five Most-Changed American Cities

A ranking of population change, home values, and jobs highlights the nation’s most dynamic and most stagnant regions.

April 23, 2025 - GoodMigrations

A large Google data center building in the Netherlands.

Rethinking Computing: Researchers Tackle AI’s Energy Demands

USC researchers are reimagining how AI systems are trained and powered — through smarter algorithms, innovative hardware, and brain-inspired designs — to dramatically reduce computing’s energy footprint.

3 hours ago - USC News

Close-up of smartphone with Zoox logo and screen with blurred image of Zoox autonomous vehicle in background.

Amazon-Owned Robotaxis to Begin Testing in LA

Los Angeles will become the sixth city where Zoox is testing its autonomous vehicle technology.

5 hours ago - Smart Cities Dive

NYC MTA train on elevated rail with Manhattan skyline visible in background.

New York MTA Says No More Borrowing, Will Cut Costs Instead

The agency says it won’t take out any new loans to finance its planned improvements and is finding other ways to cut costs.

7 hours ago - Bloomberg CityLab

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.

Senior Manager Operations, Urban Planning

New York City School Construction Authority

Building Inspector

Village of Glen Ellyn

Manager of Model Development

Central Transportation Planning Staff/Boston Region MPO