Secretary for Transport and Logistics Mable Chan on Saturday said the government is working to increase the number of charging facilities for Guangdong vehicles coming into Hong Kong under a scheme that is set to start next month.

The Southbound Travel Scheme will begin with a daily booking quota of 100 vehicles for stays of up to three days.

Chan told a Commercial Radio show that some of the charging spots would be located near an automated car park facility close to the airport that offers 1,800 spaces for air transit passengers coming down through the scheme.

"The Airport Authority will offer five fast chargers outside the car park so that it will be convenient for drivers from Guangdong to charge their vehicles before heading back to the mainland through the Hong Kong-Zhuhai-Macau Bridge," she said.

"We are also working on building chargers at a large area on Lantau so that drivers can charge their vehicles before entering the city's urban areas."

Chan said she personally hoped the cap on southbound cars could be increased.

However, she went on to say, that will depend on various factors, such as the public response once the scheme is launched, drivers' experience and the SAR's capacity for more vehicles on the road.

While autonomous driving is allowed on the mainland, Chan said the government was leaning towards disallowing use of the technology for vehicles from Guangdong.

As for traffic violations, Chan said the worst-case scenario for mainland drivers who did not pay the fine before leaving the SAR might see them get barred from applying for the scheme in the future.