Any call to abolish bus lanes is, of course, somewhat passe, but there is still an ongoing need to question the logic behind devoting an entire carriageway of the public highway to an apunctual, inefficiently engineered, pollution-generating form of public transport.
In those places where two lanes previously existed, the introduction of a bus lane approximately halves the capacity of the road. This approximately doubles the amount of congestion and, perforce, doubles the amount of pollution.
Those who attempt to justify the imposition of bus lanes, such as Transport for London, claim that bus lanes 'encourage' people to travel by bus. In fact it is claimed, without any reference to supporting documentation, that bus usage in London is up by 40% in the last 5 years. However, even if this were true, and even if this were attributable to the imposition of bus lanes, it doesn't follow that congestion will decrease as a consequence. If the capacity of a road has been halved, then approximately half of all road-users will need to travel by bus to restore the level of congestion to even its pre-existing level. And there simply aren't a sufficient number of buses for that to happen.
So the net result, then, is more congestion, more pollution, more frustration, and fractionally shorter bus journeys. Does this represent a net gain? I'm not sure that it does.