One of the busiest parts is the flyover ramp from I-75 north to I-70 west. More than 14,000 vehicles use that ramp everyday.
But with all those buses, cars and semi trucks, come problems like big accidents and big backups.
Several semis flipped on the ramp since it opened back in 2006. One loaded with paper toppled over in February. Another semi full of beer cans nearly went over the barrier last summer, spilling it's load onto the interstate below.
Two people were hospitalized after the beer cans careened into their car.
However, nothing compares to a crash involving a motorcycle just a few months after the ramp opened. A biker lost control, hit the wall, and fell to his death fifty feet below.
Eck said, "Crashes will happen and they will always happen because there's a human error factor you just can't engineer out."
But did Ohio Department of Transportation engineers do enough?
ODOT Planning Administrator Brad Lightle said, "The crashes have been reduced. You don't see any backups. You see a better performance overall and we feel it's money well spent."
Lightle said his team spent years designing a new interchange to replace the old outdated clover leaf design. It resulted in separate ramps for each direction including the flyover ramp.
Lightle said it worked. Before the redesign, the I-75 north to I-70 west clover leaf had 31 crashes a year. Since the new ramp opened, that number has fallen to 7.
"We consider that a big success," Lightle said.
Planners said the ramp actually exceeds several safety standards. The inside shoulder is double the average width. The barrier wall meets the country's highest standards and posted speed signs are several feet bigger than required.
So what's left to cause the problems? Law enforcement officers said it's speed.
The suggested speed on the ramp is 40 mph. But during a recent check, troopers found several cars and semi trucks going more than 60 mph on the ramp.
Eck said his troopers are working hard to make sure people listen to those speed limits. "If you slow down and heed those speed limits you'll have no trouble negotiating those curves and those ramps," he said.