The Immigration Department of the Hong Kong Special Administrative Region government said on Tuesday that it expected 4.58 million passenger trips passing through the territory's sea, land and air control points during the upcoming Ching Ming holiday.

The department said in a statement that, after consultation with the Shenzhen General Station of Exit and Entry Frontier Inspection and other mainland authorities, it estimated that around 3.91 million passengers will go through land boundary control points.

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The number of outbound and inbound passengers using land boundary control points will be relatively higher on April 4 and April 6, with around 561,000 passengers and 608,000 passengers respectively, the ImmD said.

It added that the passenger traffic at the Lo Wu Control Point, the Lok Ma Chau Spur Line Control Point and the Shenzhen Bay Control Point will be heavy, with a daily average forecast of about 231,000, 211,000 and 149,000 passengers, respectively

To cope with the anticipated heavy traffic during the holiday, the ImmD said it has minimized leave for frontline officers for flexible deployment and will provide extra clearance counters and kiosks.

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The ImmD said it will also coordinate with the Hong Kong Police Force, the Customs and Excise Department and the MTR Corporation Ltd to set up a joint command center at the Lo Wu Control Point to make necessary arrangements.

To avoid congestion and longer-than-usual waiting times for immigration clearance, the ImmD advised all land boundary passengers to plan in advance, avoid making their journeys during busy periods and keep track of radio and TV broadcasts on traffic conditions at various control points.