Frisco added a new red-light camera at the intersection of Preston Road and Warren Parkway.
According to Frisco police, there have been 60 crashes in the past five years at Preston and Warren. Twenty-one people were injured in those crashes, police said.
"All of the current cameras we have are statistically driven as far as there they go. We look at all of the accidents that happen in particular intersections and we focus on the most dangerous intersections," said Sgt. Jeff Inmon. "We're seeing a huge decrease in violators running red lights because of the cameras."
Frisco launched its red light program in February 2011. The city operates four cameras at three intersections.
The new red light camera at Warren and Preston was added Nov. 1, and a warning period will last until Nov. 29. The new camera will focus on southbound traffic.
"We know it's working. We know that it does reduce crashes at intersections and that's our goal," said Inmon. "We want to reduce crashes, so people don't get hurt."