Sipde is one of those non-negative consequences. You can never tell that it worked as long as you don't have an accident. If you have an accident, you probably didn't sipde. Sipde may have saved my life, but I won't know because I did not have a crash. The controlled access highways in the east are quite beaten from too much use and too little repair.
Surfaces are dangerous for motorcycles in some areas.
I was taking a 3 mile stretch of an Interstate between two rural routes. Traffic was tight and fast. A car was accelerating hard up the entrance ramp to join the flow. I could see his timing was going to be close but my scan noticed a series of potholes and broken pavement right where the ramp joined the slab. If that truck to my left slowed, I would have no place to back off, so I switched lanes early.