There is a note for future proofing
Note only private vehicle, taxi, motorcycle, and electric are currently available selections in the app as of February 2018; you can add other allowed vehicle types bus, public transportation, etc for future compatibility. Waze Staff states that prohibited rules (eg for vehicle types) should not be added as a restriction if they may conflict with an allowed rule until we are notified that the programming is changed to handle such conflicts.
recommend removing “you can add other allowed vehicle types bus, public transportation, etc for future compatibility.” since Bus is no longer allowed and you can’t select public transportation as a vehicle type.
https://wazeopedia.waze.com/wiki/USA/HOV The Note is at Step 23 of the Enter Exit anywhere section about setting up the allowable time based segment restrictions.
Change made 2/11/2021 since no dissent since proposed and someone was asking in USA SM Discord Channel why still there.