No, he wasn't moving to the centre lane, he was moving as far right in his lane as possible so that he could fit his vehicle fully in the other driver's blind spot, where he would be out of sight even if the driver did use his mirrors and turn his head the normal amount. - the cop deliberately caused the situation and was perfectly aware that the other lane was clear for taking avoiding action, the cop then deliberately left the avoiding action until after the other driver started changed lanes, even though the driver had indicated his intention to change lane a decent amount of time before, in fact the cop moved back into lane as soon as the other driver indicated - after he had looked in his mirrors. Should loose his job for deliberately getting people into trouble and causing unsafe situations.