Really?
I say that because the words I chose to use to describe who this is unconstitutional came right from the pen of Chief Justice John Roberts USSC.
When he spoke about the SUpreme Court's Terry jurisprudence, which has always been applied that a suspect has always had the right to refuse to answer questions put to him by police officers during a Terry stop. And the Fifth Amendment privilege have always attached during custodial interrogations, regardless of the reasoning for the questioning. Once the police detained a suspect for any reason, be it under the reasonable suspicion standard for a brief investigation. Or probable cause to arrest. The 5th amendment applies. As well as, absent probable cause to arrest or seek a warrant any search is also unconstitutional.
That's not just a stop on public right of way.