The second Mount Barker Freeway Interchange is under construction and has been progressing rapidly.
With the current Freeway Interchange reaching capacity in both volume & frustration levels the second interchange will be a real benefit to residents of Mount Barker, Littlehampton, Nairne and visitors from the direction of Murray Bridge.

Smoothing Traffic Flows On The South Eastern Freeway

The second interchange being built features 2 roundabouts on Bald Hills Road to enable smooth traffic flows to the on off ramps on the South Eastern Freeway. There is also an additional roundabout being constructed at the intersection of Bald Hills Road & the Old Princes Highway Nairne. This roundabout is to manage traffic flows in a much safer & timely fashion.
It is anticipated that the on ramp will be completed in February 2016 and the whole project completed by October 2016.
Plans for the Interchange & the roundabouts can be accessed from  http://www.infrastructure.sa.gov.au/road_projects/bald_hills_road_interchange