Columbus police and state transportation officials are taking a closer look at a handful of recent head-on collisions on Central Ohio interstates.
The investigation seeks to determine how and why more drivers are getting on limited access highways the wrong way.
Before dawn on Wednesday, a driver traveling northbound in the southbnound lanes of Interstate 71 collided with another car. Four people were hospitalized.
Columbus Police spokeswoman Sherry Mercurio says the collision was the second so-called "wrong-way" crash within the past week and the fifth since last December.
In most cases, the wrong way drivers have been suspected of driving under the influence. Now, Police have upgraded 9-1-1 calls about wrong-way drivers to priority runs.
At the Ohio Department of Transportation, spokesman Bruce Ward says traffic engineers have also taken note.
Ward says when accidents occur, ODOT does check signs on entrance and exit ramps to make sure they're mounted correctly and can be easily seen.