Tanak probably had no more than a second or two to decide what to do when seeing the arch on the road.

His vast experience would tell him they are inflatable and not a very solid object even when deflated. He took a chance hoping to go over it and unfortunately it got tangled in the wheels, but a heavy impact was never going to happen.

If he'd managed to go over it and continued he wouldn't have made such a an issue of it all.