Traffic congestion in Hong Kong is a big problem. This is especially so, for the areas around the "Central Harbour Tunnel", on both the Hong Kong island and Kowloon sides. This congestion had been a problem for many years, and for almost every hour in the day, 365 days a year. Recently the Hong Kong government wants to levitate the congestion by increasing land reclamation on the Hong Kong island shore front so to build more roads.
In the mean time there are 2 other tunnels; "Eastern Harbour Tunnel" and "Western Harbour Tunnel", neither of which are used by many Hong Kong drivers. This is mainly due to economics. There are truck drivers who would drive many kilometers more just to take the Central Harbour Tunnel rather than taking the more direct route of the Western Harbour Tunnel.
I believe there is a much simpler and more economical solution. Just increase the toll of the Central Harbour Tunnel so that it is much (approximately HKD10) more than the other two tunnels.
While at the same time decrease the toll of the Western Harbour Tunnel, which is capable of accommodating a much larger volume of traffic.