I drove up Lake Shore Drive today and there were two fresh sets of skid marks...one led to the cement median wall, the other off the road to the right through a fence.  Both had to be going over 100mph based on the length of them. Reminds me of the time a guy in a tricked out BMW flew by  me just before the I-55 exit one night.  I watched his brake lights swerve back and forth as he tried to slow for the turn it takes back over LSD. He left his front skirt next to the wall on the right, skidded through the turn till he hit the left side where the rest of his skirt was sitting, then across the 3 lanes at the end of the ramps turn and was trying to drive with 4 flat tires on the shoulder.  I was surprised he didn't go over the barrier at the first wall.