PHILADELPHIA (WPVI) -- The switch has now been flipped on some new red light cameras in Center City Philadelphia.
The PPA began a 60-day warning period on Monday for the cameras at the intersection of Kelly Drive and Eakins Oval.
Drivers caught running the light will get a warning in the mail.
That becomes a $100 fine starting January 8.
The city says the cameras have reduced red light running by 58 percent on average.