 From September 2015, a stretch of Stuart Highway between Barrow Creek and Alice Springs had speed limits removed for a 12-month trial.speed limits were returned on 20 November 2016 due to the electoral loss of the Country Liberal Party.Often the start of rural default 'limits' or "prima facie" allowances were signalled by use of the speed derestriction sign, catalogued R4-2 in AS1742.4.