Anime is Everything and Everywhere! It's time to make Japanese roads look more adorable.
The event was a collaboration between NEXCO Central Japan, Kadokawa and Dwango. They had agreed to create Genso Koryu (幻想交流) project. It's a collection of various special expressway in the form of Moe Anime Girls.
The story about a world called Kibou Else. This world has been destroyed due to the aftermath of world wars in the past. Fortunately, There're cute girls (the character designs based on roads in Japan) who can cure the disastrous world.
The project is in the process of creating. Official site: https://genso-koryu.jp/
More detail about the girls' expressway http://internetcom.jp/200522/genso-koryu