Brisbane's road network will receive a $1 billion over the next financial year in a bid to prevent motorists grinding to a halt.

On Tuesday Lord Mayor Graham Quirk said one-third of Brisbane City Council's $3 billion 2017-18 budget due to be delivered on Wednesday would go towards road projects to tackle congestion.

One-third of Brisbane City Council's $3 billion 2017-18 budget due to be delivered on Wednesday would go towards road projects to tackle congestion. Credit:Glenn Hunt

"If we don't keep the infrastructure build-up what happens is you get more and more delays out on the road network and there is a cost associated with that," Cr Quirk said.

"There is the direct business cost that could grow to $4 billion to $6 billion ... and then there's the lifestyle cost for Brisbane people.