Rajdhani express are premium category trains by the Indian Railways that redefines luxury travelling in India. It is a fully air-conditioned train which connects country capital (Delhi) with state capitals. That is why they are called 'Rajdhani' which translates to 'Capital' in English. These train runs at very high speed and therefore it usually takes least time to reach destination compared to other trains on the same route. Mumbai rajdhani is the fastest rajdhani train which attains a maximum speed of 140 kmph on some stretch. Rajdhani Express offers catering facilities inside the train the fare of which is included in ticket fare. Rajdhani trains have 3 classes - First AC (1A), AC II-tier (2A) and AC III-tier (3A) only and they are coupled with LHB coaches that have higher safety features. The ticket fare for Rajdhani is maximum amongst all trains on the same route and has dynamic fare (Flexi Fare) system. Waitlisted passengers are strictly not allowed inside this train. Rajdhani train coaches are usually painted in red with a grey colored strip outside. 1 rajdhani train runs from Diphu to Mariani Jn - New Delhi Dibrugarh Rajdhani Express (via New Tinsukia) (12424).

Diphu to Mariani Jn New Delhi Dibrugarh Rajdhani Express (via New Tinsukia) (12424) departs from Diphu station (DPU) at 23:23 and arrives Mariani Jn station (MXN) at 02:20. This train has 2 stoppages. Diphu to Mariani Jn rajdhani fare is Rs.1415 in First AC, Rs.850 in Second AC and Rs.620 in Third AC for this train which includes meal charges also.

Jan Shatabdi express as the name indicates is the shatabdi express for Jan (common mass). Basically these trains are an affordable version of Shatabdi trains in India. Therefore Jan Shatabdi trains have either seating arrangements as air-conditioned Chair Car (CC) or non air-conditioned Second Seating (2S) coaches. These are very pocket friendly compared to other trains on same route. These trains are for short distances and does not run overnight just like Shatabdi trains. It does not have onboard catering services which is there in Shatabdi trains. In general these trains are painted in white and blue combination with window panes painted either white or blue. 1 jan-shatabdi train runs from Diphu to Mariani Jn - JANSATABDI EXP (12067).

Diphu to Mariani Jn JANSATABDI EXP (12067) departs from Diphu station (DPU) at 09:37 and arrives Mariani Jn station (MXN) at 12:13. This train has 4 stoppages. Diphu to Mariani Jn jan-shatabdi fare is Rs.350 in Chair Car and Rs.110 in Second Seater for this train.