News Markers may herald upgrade for Princes Highway 03/01/2022 FacebookTwitterEmail PRECURSOR TO POSSIBLE ROADWORK: These markers which have appeared over the last 12 months between Mount Gambier and Millicent are the result of surveying for possible work under a $170 million program. MARKERS along the Princes Highway between Millicent and Mount Gambier are a precursor to possible future roadwork under a $170 […] Subscribe or Login to see the rest of the content. Username Password Remember Me Forgot Password