They keep that info a secret so that criminals can't access it. If all the drugdealers know which cars they use for undercover busts, that would defeat the purpose, now wouldn't it?
yep...big difference....Well, now, there's undercover cars for undercover cops & drugbusts, & then there's unmarked cars for highway patrol duty. There is definately a difference. An undercover car could be anything on the road, where an unmarked will be same type/model/series as standard issue w/out paint.
I think that using an undercover car for a traffic bust would kind of blow its cover....
undercover=no lights/used on drug busts
unmarked=lights, radars, tint, and video.