More than £5m is being spent on a road widening scheme in an attempt to cut congestion in Hull city centre.
About 54,000 vehicles use the A63 Castle Street every weekday and Hull City Council is drawing up a major plan to improve the route.
Work is not likely to start until 2012 but the council said it had a plan to ease problems in the meantime.
A section of the road leading to the Mytongate roundabout will be converted from two lanes to three.
Mark Jones, the council's head of regional development, said work needed to be done so the route could cope with extra traffic from planned developments such as the major revamp at Hull marina.
He said the council "are really having to shave the lanes and the kerbs and the footpaths" to get three lanes out of two in each direction.
Current plans show that the road will convert back to two lanes after the roundabout and there have been concerns among residents that would lead to more problems.
But Mr Jones said: "That's the work we are undertaking at the moment with the Highways Agency to effectively model the design of the junction.
"Unless the Highways Agency are entirely happy that the junction can meet their very high standards then the scheme will have to be modified."
Mr Jones admitted the works, which are expected to start in the spring, would lead to some disruption.
But he said most of the work would take place during the evening and overnight.
He said long-term plans for the remodelling of the route would go to public consultation early next year.
It is expected to take several years to complete.