So these are the MPS Readings which you have estimated between Patna & Sultanpur ..... Great ;-D
.
PS: 126 Kmph may not be possible as entire route from Sitarampur Jn to Lucknow NR via Madhupur - Patna - Mughalsarai - Varanasi - Sultanpur should allow a Max Perm Speed of 110 - 115 Kmph :-)