In America, driving long distances is practically a cultural phenomenon. So businesses take advantage of this by putting up huge signs along major roads. This trope happens when these billboards are meant to be read sequentially as you keep driving.
There was a Saturday Night Live sketch where people drove down highways and could read an entire novel, from start to finish, on the billboards
they drove past. The first one says, "Call me Ishmael
" and the next billboard provides the following sentence. Some car dealerships are almost this bad. You drive a few blocks, and the first one says, "You can always find..." and then a few blocks down you find a billboard saying "the best deals..." and then a mile away you see the punchline: "Stop in at Bob's Dodge in Leavenworth!" or whatever.