singapore singapore hop deploy autonomous bus public roads three different district city-state 2022 provide good connectivity country ministry transport say statement wednesday countries around world encourage development self-driving technologies high-density singapore manpower shortages many sectors forefront efforts hop prompt residents use share vehicles public transport least 10 company test autonomous technology island autonomous schedule bus service complement human-driven public bus initially travel less crowd roads accord statement autonomous on-demand shuttle allow commuters hail service via mobile phone government say seek input industry research institutions key requirements successful pilot launch autonomous vehicles singapore see run autonomous bus public roads 2022