The Delhi–Karnal Regional Rapid Transit System (Delhi–Karnal RRTS) is an approved, 135 km (84 mi) long, semi-high speed rail corridor connecting Delhi, Sonipat, Panipat, and Karnal in the National Capital Region.

[1][2] It is one of the three RapidX corridors planned under Phase-1 of the Rapid Rail Transport System of the National Capital Region Transport Corporation (NCRTC).

With maximum speed of 160 km/h and average speed of 120 km/h, commuters using the system will be able to cover the distance between Karnal and Delhi in 45 minutes.

[3] The line will start from Sarai Kale Khan station, which will allow interchange with Delhi-Alwar RapidX and Delhi-Meerut RapidX lines, as well as connectivity to the Nizamuddin railway station, Sarai Kale Khan ISBT and Sarai Kale Khan - Nizamuddin metro station.

There will be total 17 stations on the corridor out of which two will be underground and the rest will be elevated.