Now, there's some new research the Arizona Department of Transportation is conducting, to try and remedy the situation.
You've likely seen the new warning signs on Valley freeway ramps. You may not have seen the radar units that ADOT is testing along the 101 freeway to detect wrong-way drivers.
ADOT released video of their workers conducting research on Peoria and Glendale Avenue freeway ramps.
"Detectors hold that promise of being able to instantly known that a vehicle is entering the freeway the wrong direction, and we can quickly alert the Department of Public Safety," said Doug Nintzel with ADOT.
Dispatchers can then direct officers to the area and the traffic control center can alert drivers.
"It's not an overnight process to just snap your fingers and have a system in place, but the key thing right now is to get the warning out there for drivers," he said.
You may see those warnings on the overhead electronic traffic boards. Until the research is completed, ADOT has some sound advice.
"One of the key things we hear from DPS all the time is to stay center along the freeway because that gives you room to maneuver. Maybe avoid the HOV and left lane those key hours," said Nintzel.
The question is whether we will see some of these radar detectors across all of our valley freeways. It's a possibility that could become a pilot project in the coming months.
ADOT anticipates having the research finished this Summer or Fall.