Indias first bullet train project between Mumbai and Ahmedabad is moving ahead at a rapid pace. The National High-Speed Rail Corporation Limited (NHSRCL) has shared the latest progress on the 508-kilometer-long route. As of April 18 construction of viaducts elevated track structures has been completed on 293 kilometers of the route. Additionally pier construction (supporting pillars) is done on 375 kilometers and girder casting has been completed for 320 kilometers. NHSRCL also confirmed that bridges have been completed over all 14 rivers that fall along the route. Bullet train route The bullet train route crosses rivers in multiple districts including: Paar Kolak and Auranga in Valsad Poorna Ambika Vengania Kaveri and Kharera in Navsari Mindhola in Navsari Moher and Mahi in Kheda Dhadar in Vadodara Vatrak in Kheda Kim in Surat In addition seven steel bridges and five PSC (pre-stressed concrete) bridges are also completed. Noise barriers and track work in Gujarat: In Gujarat NHSRCL is installing noise barriers along the viaducts to reduce sound pollution. So far around 3 lakh (300000) noise barriers have been put up along 150 kilometers of the route. Nearly 143 kilometers of track bed has been prepared in the state. Work is also underway to weld rail tracks and create 200-meter-long panels on the viaducts. Overhead Equipment (OHE) masts—used to carry power lines for the train—are being installed. Between the Surat and Bilimora stations more than 100 OHE masts have already been set up covering nearly 2 kilometers of the main viaduct. Mumbai–Ahmedabad Bullet Train Project: Key Updates Total Length: 508 kilometers Route Division: Gujarat + Dadra & Nagar Haveli: 352 km Maharashtra: 156 km Total Stations: 12-- Mumbai Thane Virar Boisar Vapi Bilimora Surat Bharuch Vadodara Anand Ahmedabad Sabarmati Tunneling work in Maharashtra A 21-km-long tunnel is being constructed between BKC (Bandra-Kurla Complex) and Shilphata in Maharashtra. Using the New Austrian Tunneling Method (NATM) around 3.3 km of the tunnel has already been completed from both ends — Shilphata and Adit portal. Excavation has also progressed at other points: 56 meters deep at the Vikhroli shaft 39 meters deep at the Savli shaft In Palghar district work is ongoing for seven mountain tunnels using the NATM method. Station work in Gujarat & Maharashtra In Gujarat the structural work at six out of eight stations has been completed. In Maharashtra construction has started at all three elevated stations. Mumbai Station Construction Base slab work is currently in progress at the Mumbai bullet train station. About 75% of the required excavation is complete (roughly 1.4 million cubic meters out of the total 1.87 million cubic meters needed). The base slab will be built at the deepest level of the station. Around 200000 cubic meters of concrete will be needed just for the base slab. So far 25000 cubic meters of concrete has already been poured. Each base slab casting needs 3000 to 4000 cubic meters of concrete which is being produced on-site using a batching plant and chiller plant to maintain the correct temperature.