My frustration is MUPs aren't for going fast all the time on my bike. I wish they could be for bikes only and I could time trial away from traffic. But if I'm really pushing the speed I stick to the actual roads. The speed limit on my local MUPs is 15 mph which I exceed easily. So if there's pedestrians to pass I slow way down and holler "on your left" expecting them to veer towards the left...when they don't it's a bonus. Bikes have to yield to pedestrians. The last thing I'd want to do is hit a pedestrian on my bike, because we'd both get hurt and there's no way I'm not liable coming up behind someone on who is foot.