Sustainable mobility Battery electric bus 1 Battery electric buses 1 Bus fleets 1 Bus transportation 1 Charging (batteries) 1 Charging infrastructures 1 Charging systems 1 Cost effectiveness 1 Electric bus 1 Electric buses 1 Energy utilization 1 Fleet operations 1 Integrated optimization 1 Operational efficiencies 1 Opportunity charging system 1 Private vehicles 1 Public transit system 1 Public transit systems 1 Road congestion 1 Road vehicles 1 Roads and streets 1 Scheduling 1 Secondary batteries 1 Sensitivity analysis 1 Traffic congestion 1 Transit riderships 1 Transportation network 1 Travel time 1 Urban transport 1