The 63 km long Zestafoni–Moliti–Khashuri section (“Gorges” section) is part of the main Georgian railway line across a mountainous alignment, having a gradient with very steep slopes and tight curves. This alignment imposes very low speeds and leads to various operational problems. It takes 1. 5 hours for a passenger train to cover the 63 kilometres (39 mi) section and much longer for freight trains because of brakes overheating. For this reason, the company is modernizing the section with the target to increase capacity, reduce travel time and improve safety as well as railway operation. With a length of 8. 3 km the new T9 tunnel will soon be the longest rail tunnel in Georgia and is an essential element of the above-mentioned railway section. The tunnel will consist of two parallel tubes connected with cross passages at intervals of 300 m. The project is planned to be completed in late 2019. First trains will go in 2020, time for Tbilisi - Batumi route will be reduced by 40 minutes.