Real time position tracking, CCTV streaming/archiving, automatic diagnostics logging, there's many reasons for a modern bus to have wireless data connections and I'd be shocked if most modern buses in the US and Europe don't already have such systems (i know here in Chicago the CCTV feeds can be viewed remotely by staff and most buses have their real time position available via public REST API, though i don't know what tech the buses themselves use to transmit that data)