New App Alerts Drivers Before Traffic Lights Turn Green

A suburban city in the East Bay Area will allow commuters to use a new app that links their smartphones to traffic lights.

1 minute read

April 24, 2015, 8:00 AM PDT

By James Brasuell @CasualBrasuell


"Drivers on the city's crowded commute routes can join in the race to the digital future with a new app that will link their smartphones to traffic lights, giving them an alert when the green light is about to shine," reports Andrew McGall. "The free [EnLighten] app announced Thursday morning will work with all 100 of the city's traffic lights, which are linked to a city traffic control center."

McCall describes how the app works in more detail: "A few seconds before a red traffic light changes, EnLighten will chime to refocus drivers on driving, perhaps drawing them back from sipping coffee, doing their makeup or surreptitiously checking their cell phones. The EnLighten app is available for Android and iPhone users."

McCall goes on to describe the public-private partnership that enabled the program as well as a little information on the testing of the app. It will be interesting to see if real world tests prove the technology a safety improvement or just another way for cars to move quickly around the city's expansive residential and commercial arterials.

Thursday, April 23, 2015 in San Jose Mercury News

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

High-rise apartment buildings in Waikiki, Hawaii with steep green mountains in background.

Study: Maui’s Plan to Convert Vacation Rentals to Long-Term Housing Could Cause Nearly $1 Billion Economic Loss

The plan would reduce visitor accommodation by 25% resulting in 1,900 jobs lost.

April 6, 2025 - Honolulu Civil Beat

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 10, 2025 - Diana Ionescu

A line of white wind turbines surrounded by wheat and soybean fields with a cloudy blue sky in the background.

Wind Energy on the Rise Despite Federal Policy Reversal

The Trump administration is revoking federal support for renewable energy, but demand for new projects continues unabated.

April 15 - Fast Company

Red and white Caltrain train.

Passengers Flock to Caltrain After Electrification

The new electric trains are running faster and more reliably, leading to strong ridership growth on the Bay Area rail system.

April 15 - Office of Governor Gavin Newsom

View up at brick Catholic church towers and modern high-rise buildings.

Texas Churches Rally Behind ‘Yes in God’s Back Yard’ Legislation

Religious leaders want the state to reduce zoning regulations to streamline leasing church-owned land to housing developers.

April 15 - NBC Dallas