The government on Friday estimated that more than eight million people would travel in and out of Hong Kong during the upcoming National Day Golden Week holiday, which runs from October 1 to 8.

The Immigration Department expects around 8.76 million people, including Hong Kong residents and visitors, to pass through the city's land, sea and air checkpoints.

Of these, around 7.52 million are expected to use land boundary control points.

The department has forecast that the busiest day for outbound travel would be October 4, with around 660,000 travellers, while the busiest day for arrivals would be October 1, with around 610,000 passengers.

The busiest control points are expected to be Lo Wu, Lok Ma Chau and Shenzhen Bay.

The department advised passengers to plan ahead, avoid travelling during peak periods, and pay attention to radio and TV broadcasts for updates on traffic conditions at the control points.

The interdepartmental working group on festival arrangements, led by the chief secretary, said officials would also liaise closely with their mainland counterparts to ensure smooth passenger flow.