The speed limit within Sturt Reserve, Murray Bridge will soon be lowered to 40 kilometres per hour to make it safer for pedestrians and residents.
Residents of Uplands Drive have been in touch with the council and SA Police in recent months, concerned about speeding and hoon behaviour.
The council then wrote to the Department of Planning, Transport and Infrastructure, which approved the lower speed limit for Murray Cods Drive, Charles Sturt Drive, and parts of Sturt Reserve Road and Jaensch Road.
Mayor Brenton Lewis said he wanted to prevent reckless driving.
"Fifty is too fast, 40 is probably too fast, but if we drop the speed limit we send a message to the idiots who want to use our riverfront as a race track," he said at a meeting on Tuesday night.
A 40km/h speed limit applies in pedestrian-focused areas such as Jetty Road, Glenelg, parts of Adelaide's beachfront and some suburbs.
The council said South Australian regulations prevented a 25km/h limit from being introduced, as that speed was reserved for school zones and road works.
A 10km/h limit was an option, but the council considered it too slow.