I always understood that the idea behind this was to reduce the risk of drivers, in particular, opening their door in the path of a cyclist coming up behind. In which case it is a laudable aim. But, I would ask, what about that item, usually attached to the door which comprises a highly reflective surface, commonly called a mirror? Shouldn't the aim be to train drivers to use that device?
And what about drivers with mobility problems? I for one suffer from a problem which restricts my ability to twist which means that attempting to open a right-hand drivers door with my left hand is extremely difficult. (And yes, before anyone asks the obvious question, I do use an additional mirror for that offside blind spot.)
Now about the nearside. Who is going to be responsible if a passenger opens a door as a cyclist is passing on that side? The driver? After all, the driver is not responsible if a passenger over the age of 14 refuses to wear a seatbelt, so why should the driver accept any responsibility for adult passengers?
In a similar manner, who is responsible if a rear seat passenger opens the offside door? Are we to find that registered keepers/owners/drivers become responsible for naming passengers in the event of an accident caused by a less than careful passenger? Eg as already exists for some motoring offences.
I wonder, as well, if the car owner would have any recourse to gaining funds from a cyclist for repairs to the vehicle if it could be shown that the cyclist took no steps to announce his/her presence, eg using a bell etc.
I see so many problems arising.
Peter G. Shaw
p.s. As a matter of interest, and triggered by the Yahoo picture, I wonder what the legal situation would be if a pedestrian, legally walking on the pavement, accidently or otherwise, managed to knock a cyclist off their bicycle when said cyclist is illegally cycling on a pavement.