I’m not sure above-ground pipes makes a lot of sense. Now every building has to maintain a pump to get sewage high enough off the ground that vehicles can pass under the pipes. And if those pumps fail (e.g. power outage), all of a sudden everyone is dealing with sewage backflow.

Something I’d like to see more of is utility tunnels where all utilities are undergrounded in a single tunnel with with easy access. Yes it’s expensive, but could work out in the long run. Just look at how much utility relocation can drive up the cost for simple projects like BRT.