A 20mph limit could be imposed in Oban town centre within weeks after a pilot scheme was confirmed for the town.
Transport Scotland has drawn up projects for five Scottish towns as part of safety improvements to trunk roads.
A start date for Oban has not been announced and it is not known how much of the A85 through the town will be affected.
Oban councillor Roddy McCuish said that he was against the plan.
He added: “As much as I respect we have to keep our streets safe, we have to be sensible about this. To restrict the streets to 20mph is not a well thought out idea.
“In Oban, at the height of summer, you are lucky if you get up to 20mph.”
The first scheme will start in Maybole on September 21, where users of the A77 in south Ayrshire will be restricted to the 20mph limit.
Other towns included in the scheme are Largs, Biggar and Langholm.
Stewart Leggett, National Operations Manager said: “Safety is a priority for Transport Scotland and managing speed is an important part of our strategy. It is essential speed limits are appropriate to conditions and these pilot zones will help us establish the benefits of lowering speeds in towns villages, where it is reasonable to do so.
“This is the first of the five pilot sites which we expect to improve road safety generally while bringing specific benefits for vulnerable road users, such as older people and cyclists.
“We are pleased that the wider consultation process is now complete in Maybole and will now monitor the benefits it brings to the trunk road network.”
The towns have been identified using criteria such as the number of accidents, traffic volumes and speeds, HGV numbers and the characteristics of the location.
Chief Superintendent Iain Murray, Head of Road Policing, Police Scotland, said: “Local communities repeatedly raise concerns about speed across the country and Police Scotland continues to work with local authorities and Transport Scotland to monitor and influence road user behaviour in order to make Scotland’s roads safer.”