Kaimai Tunnel Kaimai Tunnel The Kaimai Tunnel is a railway tunnel through the Kaimai Range in the North Island of New Zealand. Since it was opened in 1978, it has held the title of longest tunnel, at 8.879 kilometres, in New Zealand, assuming this distinction from the previous title holder, the Rimutaka Tunnel. It is part of the Kaimai Deviation, which was constructed to bypass the old route of the East Coast Main Trunk Railway through the Karangahake Gorge (part of which has been preserved as the Goldfields Railway). The Kaimai Deviation is a 24 km line between Waharoa and Apata, including
Dudley Railway Tunnel trains were still allowed to use the line. It finally closed to all trains on 19 March 1993, when the section of railway between Walsall and Brierley Hill was closed after some 150 years in use. A cable laying train passed through the tunnel on 1 July 1993 - nearly four months after the line was officially closed. The railway line through Dudley is scheduled to reopen in 2023 as part of an extension to the Midland Metro,although the Metro route would not include the railway tunnel. The reutilised line will also be designed to carry heavy goods trains, which