In LA, most of the curb ramps at crosswalks are the kind where both directions share a ramp. This means that if someone has a stroller or is on a bike, the angle of the ramp sends them diagonally to the intersection. For example, if they are trying to go north from the southeast corner and are using the ramp, they have to go northwest first, before straightening out. This forces the person a little bit more into the line of northbound traffic, and frankly, it scares me every time I see it.
I’m more familiar with curb ramps that are lined up with the crosswalk in only one direction, so each corner hastwo curb ramps instead of one.
My husband and I have talked about it and we figure that it might be cheaper to have only one curb ramp, but maybe there are other reasons, too?