and despite of late running 12311 kalka has overtaken 12417 prayagraj at CNB. Ye bhi aapko pata hoga.
Later prayagraj overtook kalka because 12275 shunted kalka for which 12417 got a chance but still overtaking prayagraj and making it trail for 100 kms in its homezone itself is a achievement for a 15 hours late running train which train has achieved this feat excluding the raj/dur ?