In Cairo, they built a ton of elevated roadways throughout the city over the past 5-6 years to relieve traffic congestion, which was (and still is) among the worst in the world.
And they often put shops under those bridges. Cafes, fast food joints, etc. I think in most countries this would not be allowed due to safety codes, but I dunno. I just don’t really see it elsewhere.
This one is a little carnival under a bridge. Rides for kids.
In Japan these places are called under- girder-bridge, refered as dark, low security and low property value shops due to sound and vibration etc. from the road above. Not children's place definitely.