Cars and buses southbound often cut the corner at the traffic lights (road bends to left), driving over the cycle lane.
The cycle lane leads up to the lights but ends there and restarts some distance along the road.
It is dangerous because drivers think that cyclists are out of the way in their own lane, even larger vehicles overtake here without realising that they easily move into the bike lane. Attached a photo where that happened to me, on 21 October 2014, the bus overtook and cut me off, I had to slam the brakes in order not to be squashed.
The bike lane should be clearly separated here, bypassing the traffic lights completely.