The road between Kimba and Cleve, is one of eight South Australian regional roads to have the speed limit reduced from 110 kilometres per hour to 100 to make them safer.
The Transport Department identified the roads as having bad crash histories between 2011 and 2015.
However Cleve resident Malcolm Peters, who regularly uses the road to travel between his properties, said reducing the speed was not the answer.
“Instead of reducing the speed they should be widening the roads,” Mr Peters said.
Member for Grey Rowan Ramsey said he was unconvinced by the logic behind the decision and said the roads should be fixed.
"This seems to be a unilateral decision taken with little or no consultation with the people who live in regional SA,” he said.
"I was opposed to their action, also taken without consultation, to place a 100kmh speed limit on all roads within 100kms of Adelaide six years ago.
“This decision is opposed by the Local Government Association and I concur one hundred percent with their opinion; if the road is not up to standard, fix it, don't lower the speed limits.”
Member for Flinders Peter Treloar is disappointed to see the state government is continuing with its intention to roll out reductions in open road speed limits.
“All it will do is add to the time country people spend on the road travelling,” Mr Treloar said.
“It’s been highlighted by the RAA that there’s a funding backlog on road maintenance and I’ll continue to push for a program of shoulder sealing in order to make major roads wider and safer.”