A Tool to Show the Effects of Transit Closures

The NYC Transit Explorer from Sidewalk Labs shows how much transit service New Yorkers stand to lose when the L Train shuts down for 18 months.

1 minute read

February 26, 2017, 5:00 AM PST

By James Brasuell @CasualBrasuell


New York Subway

Leonard Zhukovsky / Shutterstock

Dan Vanderkam writes a post to explain how Sidewalk Labs worked with the New York-based advocacy group Transportation Alternatives to create an interactive tool to illustrate how the looming shutdown of the L Train in New York will affect residents and commuters.

The tool is a map demo we’re calling the NYC Transit Explorer. It’s built on top of a transit router that uses the latest GTFS feeds for all MTA bus and subway lines, as well as the Staten Island ferry, to determine travel times and routes throughout the five boroughs. Traditional navigation routers direct people from Point A to Point B (call it one-to-one); our router adds the ability to show people how long it would take to get anywhere in the city via transit from a given origin (one-to-many).

After explaining the tool, Vanderkam then walks through step-by-step examples to show how the L Train closure will affect transit trips between Brooklyn and Manhattan—in terms of general accessibility and along specific routes. The post concludes with a call to action developers and civic hackers for help improving the tool.

Thursday, February 23, 2017 in Sidewalk Talk

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

Cover CM Credits, Earn Certificates, Push Your Career Forward

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.

July 16, 2025 - Diana Ionescu

Green vintage Chicago streetcar from the 1940s parked at the Illinois Railroad Museum in 1988.

Chicago’s Ghost Rails

Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

July 13, 2025 - WTTV

Blue and silver Amtrak train with vibrant green and yellow foliage in background.

Amtrak Cutting Jobs, Funding to High-Speed Rail

The agency plans to cut 10 percent of its workforce and has confirmed it will not fund new high-speed rail projects.

July 14, 2025 - Smart Cities Dive

Worker in yellow safety vest and hard hat looks up at servers in data center.

Ohio Forces Data Centers to Prepay for Power

Utilities are calling on states to hold data center operators responsible for new energy demands to prevent leaving consumers on the hook for their bills.

July 18 - Inside Climate News

Former MARTA CEO Collie Greenwood standing in front of MARTA HQ with blurred MARTA sign visible in background.

MARTA CEO Steps Down Amid Citizenship Concerns

MARTA’s board announced Thursday that its chief, who is from Canada, is resigning due to questions about his immigration status.

July 18 - WABE

Rendering of proposed protected bikeway in Santa Clara, California.

Silicon Valley ‘Bike Superhighway’ Awarded $14M State Grant

A Caltrans grant brings the 10-mile Central Bikeway project connecting Santa Clara and East San Jose closer to fruition.

July 17 - San José Spotlight