I think the Incredibell works great on the MUP. A simple "ding" normally gets the attention of whoever needs to hear it. And, when it doesn't, I just slow down and make a safe pass. Riding isn't about trying to beat a meaningless time. IMO, there's no excuse for me to be in an accident on an MUP. Like on my motorcycle on the road, I need to know where my escape path is or I need to be riding slow enough to get through whatever congestion is nearby.

I hate it when I see cyclist ripping past little kids or the elderly while yelling "ON YOUR LEFT!!!". They are idiots that think that they need to fly down the MUP at high-speeds. No common sense whatsoever. Total chumps.