Automobile Intersections can be one of the most dangerous situations for cyclists. The vast vast majority of car-bike collisions occur at intersections. The next part will deal with how to deal with intersections in an ideal manner. This one will talk about why bike paths at intersections are dangerous.
Intersections have multiple lanes for the multiple destinations of automobiles. Left, right and straight ahead. Having a bike lane entering the intersection on the right hand side of poses a dangerous situation. A driver who wishes to make a right hand turn will have to cut right across the bike path. He will do this as he is looking left for cross traffic and is not looking for a cyclist. However if the bike lane disappeared about 20-50 meters before the interesection then the automobile would be forced to merge in with the bike lane first, then make the right hand turn, which would be a much safer course of action.
In addition, having the cyclist stay on the right for all cases will delay him because if he wishes to make a left hand turn. He would have cross the intersection and then wait for the change of the lights to cross again. This is needless waiting and another reason why simply widening the outer lane by the width of a bike path is safer for cyclists than to add one to the side of the road.