What time of day was it?
On the MUPs around here, if it's rush hour on the roads, it's also commuter rush hour on the MUP. Those riders tend to not weave around like they're scouting for platypus, they're just going to work. From late morning thru early afternoon, it's the housewives, househusbands, tourists, and people with nothing better to do besides pick up their dog's poop. That's only if the weather is nice, though. After that, it's the commuters again.
Weekends are the worst time to do anything on a MUP here besides practicing accident avoidance skills.