In South India, most congested route in terms of number of services (non suburban area) in a week is ERS-SRR section.It has more trains than BZA - GDR and KPD-JTJ/SA in a week.. SR has no interest to upgrade ERS-SRR even after Keralites are demanding this for a long time.Not even automatic signalling in this route. MPS of this route remains at 90 KM/Hr for a long time.