Please can you give some publicity to the benefits of zip merging, which occasionally at long-term roadworks is encouraged with signage. But this is the exception to the norm. For example, when roadworks or an accident force two lanes into one, the signage usually instructs drivers to leave the obstructed lane in good time. Usually the lane in use is at a standstill and it is difficult to move over. Anyway, some drivers, who can seem selfish to others, continue to the front of the blocked lane, in order to "push in" and gain places in the queue. If drivers are encouraged to occupy both lanes up to the closure, both queues tend to become equal. Then, merging into the authorised lane alternately with those already there does not mean "jumping the queue". If "one for one" becomes accepted as the norm, nobody gains an unfair advantage and time is gained by all. The current system actually wastes the road space in the blocked lane to no purpose.