Uncertainty over end to tolls on Sydney Harbour Tunnel next year Normal text size Advertisement The tolling regime for the Sydney Harbour Tunnel is due to expire in just over 18 months, putting the onus on the Berejiklian government to reveal whether it will make southbound journeys free for motorists or extend the charges for years. Internal documents show the state's transport agency has had "end-of-concession planning" for the 2.7-kilometre tunnel under way for at least the past 18 months. "The future management option of Sydney Harbour Tunnel post concession expiry is subject to government decision," they state. The Sydney Harbour Tunnel's toll concession deed is due to expire next year.