Changes to the speed limit on the South Eastern Freeway have begun along with other new road rules.
A change to safety standards for heavy trailers will be adopted in South Australia from 1 July 2014.
Two new wombat crossings improve pedestrian safety on Mount Barker Rd.
Three intersections in the Adelaide Hills will be upgraded, including the busy Onkaparinga Valley Road intersection, as part of the road safety infrastructure program.
A range of intersection upgrades and motorcycle safety improvements will take place in the Adelaide Hills over the next two years.
Wire Rope Safety Barriers (WRSB) with the potential to stop road crashes have been installed on Main North Road.