![I-17 Ramp Lights Have Role in Wrong-Way Vehicle System](https://footework.com/wp-content/uploads/2018/08/I-17color.jpg)
I-17 Ramp Lights Have Role in Wrong-Way Vehicle System
Phoenix-area drivers are used to seeing freeway entrance-ramp meters with alternating green and red traffic lights during weekday rush hours. But some of the red lights in Interstate 17 ramp meters also play a role as part of the pilot wrong-way vehicle detection system being tested by the Arizona Department of Transportation.