Crunching the Numbers on L.A. Traffic

At the Automated Traffic Surveillance and Control center (ATSAC) near City Hall in Los Angeles, a team of engineers watches traffic flow all over the city, sucking in tons of data to improve transit and automotive circulation.

1 minute read

June 2, 2010, 1:00 PM PDT

By Tim Halbur


Ryan Bradley of GOOD pays a visit to ATSAC, which he says resembles the command centers one sees in movies and TV.

He writes, "ATSAC was created for two reasons. First, to adjust traffic signals in real time to respond to events that may cause congestion, like a car accident or a Lakers championship. Before ATSAC, the Department of Transportation had to send someone out into the field to adjust traffic signals. Now, these adjustments can be made throughout the city from this underground bunker next to City Hall, by those men watching those 16 screens, as thousands of cameras trained on thousands of intersections record the goings-on on the streets above."

The second goal of ATSAC, as Bradley points out, is to collect reams of data that can then be used to understand how traffic flows and where it can be improved.

Here's the the official page of ATSAC.

Wednesday, June 2, 2010 in GOOD Magazine

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

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

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 16, 2025 - Diana Ionescu

Black and white photos of camp made up of small 'earthquake shacks' in Dolores Park in 1906 after the San Francisco earthquake.

The 120 Year Old Tiny Home Villages That Sheltered San Francisco’s Earthquake Refugees

More than a century ago, San Francisco mobilized to house thousands of residents displaced by the 1906 earthquake. Could their strategy offer a model for the present?

April 15, 2025 - Charles F. Bloszies

Entrance to subterranean Hollywood/Vine Metro station in Los Angeles, California surrounded by tall apartment buildings.

Opinion: California’s SB 79 Would Improve Housing Affordability and Transit Access

A proposed bill would legalize transit-oriented development statewide.

April 21 - San Gabriel Valley Tribune

Yellow roadside sign with extreme heat warning: "Danger - Extreme Conditions! - STOP - Do not hike Jun-Sep - HEAT KILLS"

Record Temperatures Prompt Push for Environmental Justice Bills

Nevada legislators are proposing laws that would mandate heat mitigation measures to protect residents from the impacts of extreme heat.

April 21 - Nevada Current

View of downtown Pittsburgh, PA with river and bridge in foreground at dusk.

Downtown Pittsburgh Set to Gain 1,300 New Housing Units

Pittsburgh’s office buildings, many of which date back to the early 20th century, are prime candidates for conversion to housing.

April 21 - Axios