Pedestrian / bike bridges on top of highways / streets in NWA?

I think it beats traffic lights, it also looks cooler! Attaching an example here, do you picture this being used on top of I-49 or anything crazy like that? :O

https://preview.redd.it/6jz2ombhzgda1.jpg?width=1500&format=pjpg&auto=webp&v=enabled&s=aaad9b6856e14ccabd8525c19735d6393d36faf4