If traffic signals could use data about vehicles' location and trajectory to either extend green lights by brief moments when cars are in the dilemma zone, or change to yellow early when no cars ...

Today's busy roadways need signal lights to keep traffic flowing and prevent accidents. Here's what the traffic light symbols ...

A sideways traffic light might look strange at first, but it’s fully functional and intentional. In several U.S. states, horizontal traffic lights are the standard. They display the same red, yellow, ...

Traffic lights haven't changed much in the U.S. over the years. Cleveland debuted what is considered the first "municipal traffic control system" in 1914, historian Megan Kate Nelson wrote for ...

The yellow light would not come into play until the 1920s. William Potts, who was a police officer in Detroit, is credited for designing the first three and four-way colored traffic lights.

Whoever came up with this idea deserves an award. Tom Darby, San Jose A: The yellow frames around the perimeter of traffic lights are called reflective backplates.

ALBUQUERQUE IS ADDING NEW TRAFFIC SIGNALS TO MAKE CROSSING THE STREET SAFER. BUT THE SIGNALS HAVE DIFFERENT RULES THAN OTHER ...

According to a traffic study funded by the National Motorists Association Foundation, or NMAF, these are the recommendations they've published for timing of yellow lights: 25 MPH -- 3.0 Seconds ...

Vehicles facing a steady yellow signal are warned that the green light is ending and a red light is about to appear, South Carolina Code § 56-5-970 (B) states.

News Yellow lights and red-light cameras A red-light camera monitors the North Service Road of the LIE at Ronkonkoma Avenue in Ronkonkoma. (Oct. 28, 2010) Credit: James Carbone ...

For left turns, yellow lights are as much as 3 seconds longer. Yellow light intervals in Phoenix are typically between 3 and 6 seconds, said Kini Knudson, Phoenix's Streets Department director.

The yellow light didn’t enter the scene until the 1920s. William Potts, who was a police officer in Detroit, is credited with designing the first three- and four-way colored traffic lights.