The 12309 / 12310 Rajendra Nagar Terminal (Patna)-New Delhi Tejas Rajdhani Express is a Rajdhani class train of Indian Railways, that connects the state capital of Bihar, Patna to the national capital of India, Delhi.

This Train was originally introduced in the Annual Railway Budget of 1996–97 as a daily Rajdhani Express from New Delhi to Patna via Lucknow.

It covers a distance of 1001 km in each direction, however it takes 12 hours 5 minutes when operating as train number 12310 at an average speed of 83 km/h (including halts).

It is the Fastest train of India to cover 1001 Km in just 11 hours and 30 min and The only Rajdhani Express to be have an Iso-Certification.

However, with an increase in passenger pressure over Patna Junction, Indian Railways decided to construct a new satellite station to Patna Junction, in order to accommodate the growing passenger pressure.