[ipqk]

But each conflict point is crossing only one direction of traffic, and there are no cars turning left or right into the crosswalks (which is huge cause of pedestrian impacts). So even though there are 4 crosswalks, maybe the aggregate danger is less?

[bobthepanda]

It’s just extremely unpleasant as a pedestrian to be in the middle of 55MPH (88km/h) traffic, even if you are separated by concrete barriers, due to all the noise and particulates.

Each individual crossing is also wider if you are staying on the same side of the road. In a traditional diamond you’d be crossing one-lane on and off ramps, not half of one of the major roads each time.