Outdoor Digital Billboard Which Recognizes Make and Model of Passing Cars- (Idea 41 of 365)

OK, yet another digital billboard idea. This new outdoor billboard (next to highways) would use tech similar to facial recognition to recognize the make and model of the cars on the road. Advertisers could serve up custom advertising based on the makeup of cars on the road. Audi driver coming down the road? Serve him a BMW lease offer, knowing that his 3 year old Audi could very well be coming off lease soon.