The promise of turn-up-and-go trains when the $15bn Metro Tunnel opens this year has gone off the rails after upgrades to existing lines were cut back or delayed.

A driver has been rescued from the wreckage of a bus that hit a tree at the O-Bahn interchange in Adelaide's north-eastern ...

The South Australian is charging towards a decarbonised public transport system, with 60 brand new 100 per cent full battery electric buses.