City road ban is on its way.
Only buses, taxis, emergency vehicles and cyclists will still be able to use the road, although delivery and other service vehicles will be allowed access between 6pm and noon the next day.
Following an experimental period, substantial improvements will be made to St Mary Street, through wider pavements and new paving, from April 2008. Executive member for transport, Councillor Elgan Morgan said: "We are doing this for a period to identify any problems. If the trial is a success, we will make it permanent, with changes including wider pavements.
"The changes to St Mary Street and High Street will hugely improve the area for those who work, visit or shop there."