People who dirty the roads dont give a f**k about anyone else or they would clean it up. I used to ride a bike all year round and ever time i came off it it was because of s**t on the road, down by the local golf course mud on the road, some prick with diesel spilling out of his truck due to over filling the tank. Its s**t because you can be doing a decent lawfull speed when you come round a sharp bend and there in front of you mud and s**t, cheers mister farmer t**t.