Directions
Hmm, lane avenue will be closed by then, they're redoing that bridge, that complicates things a bit. This is probably the simplest way now:
Take 70 or 71 toward columbus. If you can't find those, I can't help you
From 70, get to 71 north. Now everyone will be on 71.
Exit 71 at 11th avenue. Turn west on 11th.
Take 11th west; you'll go under an overpass, then hit a light. 11th becomes one-way east at this point, so turn right (north).
Go one block, turn left (west) onto chittenden (the road dead-ends and Chit. is one-way west- can't get lost here).
Take chittenden west, go through the light at 4th, then Summit. The next light should be High St- Chit dead-ends here. Turn right (north).
1 block north is 12th avenue. turn left at the light and immediately make a right-hand turn onto the service road that runs the length of the Ohio Union building. at the end of the service road, turn left into the parking garage
Getting back out is simpler, you just take High south to 11th and you can get all the way to the freeway.