I have 2 MUP's paths in my 15 mile communte. 1 is usually clear and clean, but the other goes inner-city, and the constant debris and glass makes it risky for bike use, especially skinny road tires. The communte home has a lot of more foot traffic, especially walkers with dogs on long leashes, that jump in front if bikers, and I find it too dangerious on eithr path in the evening.