The City last week installed lines of sandbags with flexible bollards along Berrigan Drive, preventing cars coming from North Lake Road turning right into the Caltex Woolworths service station.
City of Cockburn engineering and works director Charles Sullivan said the action was necessary.
“The location has had an increasing number and severity of crashes over the past 12 months, including a severe accident late last year in which a child was injured,” he said.
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“As the local road network manager, the City had to take urgent temporary action to prevent further crashes while a permanent solution is worked out.”
Mr Sullivan said the measure would remain in place until a permanent solution was agreed upon with Main Roads WA.
“The City seeks to resolve the matter with Main Roads WA as soon as possible as the City fully understands the impact on the adjacent local businesses,” he said.
“But as a responsible road network manager the City has to put the safety of the travelling public first and foremost to prevent injury or possible fatalities at this location.”
Councillor Steve Portelli said he had raised the site for attention after complaints from residents.