The vehicular movement on the Sri Jayewardenepura Road, near the Welikada Junction would be restricted to two lanes both ways, due to the construction work of the Rajagiriya flyover, the Police said.
The Police also advised motorists to use alternative routes to avoid congestion.
The construction of the Rajagiriya flyover has now reached its last stages and it is expected to be opened on January 09.
Therefore, heavy traffic is expected in the area from tomorrow till the opening of the flyover.
The government said the flyover was constructed 12 months ahead of its schedule.