I took this photo while in Seoul. That's a stairway to cross over an el platform for the Metro. Note the rail along the right side of the stairs to wheel a bike up. Even inexpensive improvements to make bike/transit combinations more accessible are welcoming.
Those yellow inlays at the forefront of the photo are for the blind. You see them all over Seoul and even on newer Beijing sidewalks, usually near the edge away from the road.