Compulsory purchase orders will be drawn up to allow work to go ahead on the Berryden Corridor improvements.
The proposal was approved at a full council meeting which also instructed officers to continue to attempt voluntary acquisition of buildings on the route.
Officers will submit the completed documents to a future full council meeting for resolution on making the compulsory purchase orders.
Aberdeen City Council Transport and Regeneration spokesman Councillor Ross Grant said: “While we still hope to acquire the properties on the route of the improvement scheme through ongoing discussions with property owners, we are taking this step in tandem to ensure that we deliver, on time, this £26.4 million scheme that will benefit motorists, cyclists and pedestrians, making it easier to get around the city.”
Derelict buildings on Powis Terrace have already been earmarked for demolition in the coming weeks to allow work to go ahead with the Aberdeen City Council scheme.