I was intrigued recently by a lawmaker who proposed that the tunnels connecting Kowloon and the New Territories be made free of charge, in order to alleviate the potential rise in costs from the price restructuring at the three cross-harbour tunnels. The idea is certainly popular with many road users, but why not make all our roads and tunnels free? As others have argued, motorists are already paying the annual road tax and some tunnels have already recovered their building costs.

It makes economic sense to charge motorists because tunnels are expensive to build and costly to maintain, especially when expensive engineering techniques were used to adjust to the city’s geological landscape. However, the way these charges are levied is inconsistent because major highways, such as the Tolo Harbour and Tuen Mun highways, are toll-free, despite the great financial costs incurred, and engineering complexity and environmental damage involved because of land reclamation and pollution.

Infrastructure investments are not proposed because they make private investment sense, but because building them contributes to our overall economy and employment, relieves traffic and increases mobility. Not only have these factors benefited New Territories residents, but all of Hong Kong. At the moment, out of 16 tunnels, three – Kai Tak, Cheung Tsing, and Nam Wan – are already toll-free, and their maintenance costs are particularly low, as they do not require workers to man toll booths and there are no other additional administrative costs to consider.