A Mount Gambier car dealership has spoken out against proposed new bicycle lanes on Penola Road, saying they will have a negative impact on their business and restrict customer parking during peak times.

The Department of Planning, Transport and Infrastructure is asking for community consultation on the road works, which will see restricted parking on Penola Road to allow the introduction of bicycle lanes.

There will be no parking between the hours of 7-9am and 4-6pm on weekdays once the work is completed, forcing drivers to use alternative areas, such as Frew Park or central business district parking areas.

Director of OG Roberts, Peter Roberts said his business, which had fronted Penola Rd for over 20 years, relied heavily on drive-by trade.

"This is an impulse type of business where people pull up and have a look at our products.

"It's a busy road - when you close the roads on both sides for half the day for minimal bike traffic, it's ludicrous.

"The reality is it will be four hours a day, which is half our trading hours. We're restricting the trade of all those businesses for the sake of very few bike riders.

"I sat there for one hour yesterday and didn't see one bike," he said.

Mr Roberts said there was already a bike lane running from Frew Park for cyclists to use and he believed the parking restrictions would put additional pressure on other designated parking spaces.

"Frew Park is a parkland - I don't think we should be clogging that up with cars. It will put pressure on all other car parking in the area as well."

Mount Gambier already has several bike lanes in operation around the city, including Crouch Street North, Wireless Road West, Pinehall Avenue and Kennedy Avenue.

Mount Gambier Cycling and Triathlon Club Secretary, Tina Opperman said she welcomed the new bike lanes, but still felt there was an 'attitude' against cyclists from motorists.

"It's an on-going battle, it's really about changing attitudes and this is a great example of trying to do that."

Mrs Opperman said her husband, professional cyclist Matthew Opperman and their two children, who ride on a regular basis had suffered some bad experiences on the road and were concerned about a recent backlash on social media.

"Cyclists aren't the most liked people in town. It's about sharing the road - it's not just about cars.

"We have to learn to work in unison together on the road."

Mrs Opperman said while recreational cyclists did not contribute to infrastructure costs, professional cyclists paid hundreds of dollars a year to Cycling Australia for a road licence.

She said members of the club tended to steer clear of busy roads and bike lanes in the city, instead preferring roads that had less traffic, but still put her support behind the new lanes.

"These lanes make it so much more easier for us to jump on a bike and ride into town and they're important for safety.

"We encourage people to jump on a bike and promote a healthy lifestyle. It's also environmentally friendly."

The submission period to have your say on the proposal closes this Friday, September 27.

Mr Roberts said he has put in a submission to DPTI, and has the support of other local businesses against the proposal.

"I've made my point very clearly. If it did happen we'd be seeking compensation," he said.

"It will affect our business and our livelihood."