The road from the Kelanithissa Roundabout to the Orugodawaththa Roundabout along Baseline Road will be closed from 5 am today to 5 am on Monday in view of carpeting on the main road for the construction of the new Kelani Bridge.
Authorities said motorists must use alternate routes to travel during the weekend.
Accordingly, drivers are advised to use School Lane via Srimavo Bandaranaike Mawatha, from the Kelanithissa Roundabout of the Kelani Bridge, to ply to Colombo.
Motorists can also use the Armour Street towards Borella to reach Colombo.
Police said motorists can use Gnanartha Pradeepa Mawatha, and Sri Saddarma Mawatha from Baseline Road as well.