Mumbai Local - RailFanning nirvana.

That day one funny incident had taken place..
When saurashtra express 19216 comes to halt at udhana junction the rake of udhana varanasi was on siding track...but an et wam4 was connected to it....then on arriving at navsari saurashtra express went on loop line pf3 of navsari railway station..I thought some superfast train would overtake it there but when the other train come on navsari pf2 it was same empty rake of udhana varanasi express...who overtook us at navsari railway station...which is going towards valsad....as the same rake is used for valsad haridwar express..
Then...
more...

aftersome time our saurashtra express departed from navsari and when we reached bilimora railway station I saw again that udhana varanasi rake...but this time udhana varanasi empty rake was on loop line and saurashtra express overtook that train at bilimora.....
I didnt understand that if they r going to put empty rake of udhana varanasi on loop line...
then why our saurashtra express was on loop line and allow that train to overtook us...?..
and also now a days many times indian railways put many express/passenger trains on loop line and allow other goods and empty rakes to over took it.....
infact few days before mine 19011 gujrat express was on loop line at veddcha and one single wag5 locomotive overtook it....and after seeing that I was surprised. .