The 8.38 miles Tawa Flat deviation is a double-track section of the Kāpiti Line just north of Wellington, New Zealand, with two tunnels; the southernmost section of the North Island Main Trunk railway
The NIMT Tawa Flat deviation's double-track climbing towards Tawa No. 1 tunnel over the up Wairarapa Line and Hutt Rd, with Ngauranga station in the background alongside the State Highway 1 motorway.