At the level of a journey they already have a lot of coverage for that data with ANPR although this would increase granularity: http://en.wikipedia.org/wiki/Po

At the level of a journey they already have a lot of coverage for that data with ANPR although this would increase granularity: http://en.wikipedia.org/wiki/Police-enforced_ANPR_in_the_UK http://en.wikipedia.org/wiki/Police-enforced_ANPR_in_the_UK