>>1783308>advisory bike lanePittsburgh recently opened one of these. South Side, that east-west part of S 18th that runs under the Birmingham Bridge.
I don't know that it's necessary, but I don't think it will be a failure like that California one. The road has some car traffic, but it's not a through street. Mostly people going to that dog park, boat ramp, or just parking to ride the trail.
The signage is abominable however.