Aronai Express
The 12507 / 12508 Aronai Superfast Express is a Superfast [Express trains in India|superfast express] train belonging to Indian Railways. It is operated by Northeast Frontier Railway zone that runs between in Kerala and in Assam. It is the Longest train services#Top 50 [train services, by distance|28th longest train service in the world]. Initially, Thiruvananthapuram–Silchar Aronai Superfast Express ran between and via Katpadi, Cuttack, Kharagpur, Rampurhat, Malda Town, New Jalpaiguri. On 21 November 2017, it was extended to Silchar. After this extension, it is now the second longest running train in India.
The express train service was started on 14 April 1987. It operates as train number 12507 from Thiruvananthapuram Central to Silchar and as train number 12508 in the reverse direction serving the 8 states of Assam, West Bengal, Bihar, Jharkhand, Odisha, Andhra Pradesh, Tamil Nadu and Kerala.