All except for the groves; Every once in a while I hit one with my motorcycle... (grrrr) Of course, they're not any more difficult to deal with than the tar that they use to fill the cracks in the road. The tar turns to gum when the temp gets above 100, (just about every day), and it's *not* fun to deal with on a motorcycle. =)
In Woodland the tar is very slippery too!!!!!!!!! What fun while the front tire slips and then the rear.
John
John Fabiani
Woodland, CA