I avoid the MUPs with my TT Bike except for one and only early in the AM, reason being is it is wide, fairly straight, and fast and slightly hilly with no real blind points or sharp turns. Its a rare one though on the route to the beach. Otherwise I always ride my Road bike, too many idiots, bumps, and sharp turns to get what I want out of the workout. You can't get into your aerobars and "in the zone" when you have to make changes in your position and maneuvers to avoid all kinds of stuff.