MOTORISTS will be banned from driving on a city centre street for one hour this weekend.
There will be no driving on a section Union Street between noon and 1pm on Sunday.
The road will be shut between its junctions with Back Wynd and Broad Street.
It will also be closed between Castle Street between its junctions with Broad Street and King Street.
It is to allow the Aberdeen Trade Union Council to march to the Castlegate.
An alternative route for eastbound traffic is available via Union Terrace, Rosemount Viaduct, Schoolhill, Upperkirkgate, Gallowgate, Little John Street, West North Street and King Street.
Access to properties will be maintained, but no through traffic is possible.