They actually started the reversed-text practice in 1977 – not for ease-of-reading reasons, but because too many people were driving backward down the highway blasting the Star Wars opening theme.
![[[Words are painted in white on a black road.]] BACKWARD. I READ THINK ENGINEERS HIGHWAY](https://imgs.xkcd.com/comics/ahead_stop.png "They actually started the reversed-text practice in 1977 -- not for ease-of-reading reasons, but because too many people were driving backward down the highway blasting the Star Wars opening theme.")