There are a few reasons why the colors red, yellow, and green were chosen for traffic lights. Red is an obvious choice. The color red means danger or to be alert for something occurring.

Eventually, the upgrades could do away entirely with the red, yellow and green lights of today, ceding control to driverless cars. Henry Liu, ...

The first traffic signals were not red, yellow and green. Here's why they are now. We're talking transportation with Jim Cameron every week.

Eventually, the upgrades could do away entirely with the red, yellow and green lights of today, ceding control to driverless cars. Recommended Videos. Henry Liu, ...

Eventually, the upgrades could do away entirely with the red, yellow and green lights of today, ceding control to driverless cars. Henry Liu, ...

Eventually, the upgrades could do away entirely with the red, yellow and green lights of today, ceding control to driverless cars. Henry Liu, ...

Eventually, the upgrades could do away entirely with the red, yellow and green lights of today. Skip to content. All Sections. Subscribe Now. 52°F. Saturday, March 22nd 2025 e-Pilot.