The MUP I do my rides on has a 20 mph speed limit on the service roads, none on the actual 7 mile loop. The loop is wider than a normal car lane and is one way traffic. Because it's a large oval shaped loop, you don't get to see many people on it even when it's crowded. Weekends are more hazardous because there are many families that bring their children out and ride together making the two way service roads a bit more dangerous. It's not the same MUP that the OP and I were on when this incident occurred.