Lucknow Metro is a rapid transit system serving the city of Lucknow in the Indian state of Uttar Pradesh. Construction of the line begun on 27 September 2014 with the 8.5 km (5.3 mi) stretch from Transport Nagar to Charbagh Railway Station which began its commercial operation on 5 September 2017, making it the fastest built metro rail system in the country. Full operation on Red Line stretch from Chaudhary Charan Singh International Airport metro station to Munshi Pulia metro station began operation on 8 March 2019.
The Lucknow metro covers a distance of 22.87 km with 22 stations. It is the eighth longest operational metro network in India after the Delhi Metro, Hyderabad Metro, Chennai Metro, Namma Metro, Kolkata Metro, Noida Metro, and Kochi Metro.