[vizeroth]

This depends somewhat on the number of lanes and the situation. In California it is possible that you could be ticketed for impeding the flow of traffic, although most officers are unlikely to pull you over for this as long as you get out of the lane when they come up behind you (unless you were causing a serious problem).

One of the reasons they would prefer to flush you out of the lane rather than pull you over and give you a ticket is that the very action of pulling you over (possibly across all lanes of traffic) and sitting on the side of the road while ticketing you causes other drivers to slow down (sometimes erratically) and increases the likelihood of a collision.

The CalTrans manual for setting speed limits includes some references for many of the issues this article is discussing: http://www.dot.ca.gov/trafficops/camutcd/docs/california-man...