It may not be the answer you were looking for, but Peterborough centre had a series of bus lanes imposed while some major long term roadworks were being undertaken. Congestion was major, and i guess public transport was being allowed to move as freely as possible....with the added bonus that if people could see this was the case, it may encourage more use of public transport.
Cycles, motorcycles and taxis were also allowed to use the bus lanes.
There were no incidents i was aware of in the 12 to 18 months it was in use.
I used the bus lanes regularly and remember more close calls with taxis and buses than motorcycles.
In fact, i can only remember ONCE getting spooked by a m/cycle that surprised me. Taxis however were (as usual) a far greater danger
...albeit a small one in relation to using the normal roads.
I loved them bus lanes for the most part. I had no real problem with other users....shame they've finished now. Now we're all in the mix.
FWIW...i am not a motorcyclist...never have been.