The fun never ends in NFS games and there is plenty of in Criterion’s Need For Speed: Most Wanted. Speed Cameras, Car Locations is all part of the adrenaline pumped action. Another fun thing to do in the game is to smash the billboards placed tactically at various locations in the game.
In total, there are 159 of these boards, and if you manage to smash them all, you will unlock “Got to Smash Them All” achievement/trophy.
Some of them will be part of the normal races while for others, you will have to do some effort as their locations aren’t marked by default on the map. However, there is nothing to be worried about as the following video will help you out in locating these billboards: