Cotter Road currently has a lane closed each way on the stretch between the Parkway flyover and the Streeton Drive traffic lights. As you can imagine, between 8am and 9am this causes all sorts of joy for commuters, as three lanes (two on Streeton, one on Cotter Road) become one.
Most people seem to move into the left hand lane well ahead of time, knowing that the right hand lane is closed just before the RSPCA. However, this frees up the right hand lane, and you then have two different types of driver: the first overtakes half the cars in the left lane, sticks his/her indicator on, and merges 60 metres or so before the lane ends, whereas the second overtakes everyone, and forces his/her way in just before the lane ends.
This morning I was wondering what the proper etiquette is. Is there any reason not to make full use of an empty lane? Surely the most efficient way is for both lanes to be full of cars right up to the point of closure, and then merge alternately?