The Palaruvi Express (Train number: 16791/16792) is a daily Intercity express train which runs between Tirunelveli Junction in Tamil Nadu and Palakkad Junction in Kerala. The train first introduced as a service running between Punalur in Kollam to Palakkad.^[3] On 9 July 2018, it was extended up to Tirunelveli Junction.^[4]

The train was introduced on 19 April 2017,^[5] providing better connectivity to the Eastern Kollam region with Central Kerala and as a relief for daily commuters, especially office-goers who have been relying on Venad Express.^[6][7][8][9]

On 29 May 2022 it became the First train to pass through the Doubled track between Ettumanoor-Kottayam-Chingavanam section which made the Thiruvananthapuram-Kottayam-Eranakulam-Mangaluru section completely doubled electrified line.

The service runs from Tirunelveli Junction(16791) every night and reaches Palakkad Junction the following afternoon. Prominent stoppages include Tenkasi Junction, Punalur, Kollam Junction,Chengannur,^{[lower-alpha 1]} Kayamkulam Junction, Kottayam, Ernakulam Town and Thrissur. On the return journey, the train leaves every evening, traverses the same route and reaches Tirunelveli Junction, next morning.^[10]

The train has 14 coaches comprising 4 Sleeper Coaches, 8 unreserved general coaches and 2 Luggage Rakes.^{[11][lower-alpha 2]}

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Since its introduction in April 2017, the train was running without even a single reservation compartment till September 2019. The train started 4 reservation sleeper compartments.

• Venad Express
• Kollam–Thiruvananthapuram trunk line
• Kollam–Sengottai branch line
• Shoranur–Cochin Harbour section