When I cycle to work, I travel over London Bridge
There's also, as you can see, a lot of buses on the bridge, clogging the lanes up and slowing things down to their speed, and so I'm nearly always waiting at the traffic lights at the end of the bridge, while the traffic flows west up the hill and on north / south as it will. And then the lights change there, and the buses head into the station, south of that peninsula, and the bikes head down Duke Street Hill - except that the pedestrians have spotted that while their light is red, the light for traffic coming up the hill has just switched from green to red, so they pour over the road, unaware that the approaching bikes have a green light, becaue you know what bikes are like, right?
I think it's a very English situation, and indeed a very London one - no attention paid to the red lights by the commuters, but nothing more than scathing glares from them when the bikes try to get through a green light (there's something stronger than glares generally coming from the bikes. Well, from mine, anyway).
ANYWAY, that's my commute frustration - what's yours?