Sir shuru me sare lines same hi the.
Pehla line HWH-BDC-PDA-BWN-BHW-SBG-BGP-KIUL-DNR-MGS wala tha lekin bada circular ghumna padta tha, fir RNG me coal mila toh fir HWH-BWN-ASN-KIUL-DNR-MGS bana, yeh sab EIR ne banaya. EIR ne PNBE (Bakimpore) se GAYA bhi ek line banaya. Upar se BNR ne ASN-CKP-BSP-NGP wala line banaya joki 2nd HWH-CSTM line bani. PRYJ-JBP wala line bhi shayad BNR hi banay tha. Fir JRI me coal mila ASN-DHN-KTH line bana.
Fir DHN-GAYA-MGS banna joki Grand Chord ke naam se jana gaya. Fir HWH-KGP-CKP line bana, aur ADRA-GMO/ADRA-DHN line banaya BNR...
more... ne.
fir 1950 ya 1955 me EIR aur BNR ko milakar ER bana, fir ER se NR, NCR,SER, ECR, SECR, ECOR wagera banna.
EIR me 6 divisions se Howrah, Asansol, Danapur, Allahabad, Moradabad and Lucknow.
GC line ka success hone ka teen main karan tha.
1. GC line sabse chota tha.
2. Population ekdum kaam tha, halts kaam dene pade, upar se resistance ke chances bhi kaam the.
3. Tab Kolkata puri Indian economy ko dominate karta tha. Isiliye HWH-NDLS ka shortest route ko itna priority mila tha. Tab PNBE and others itne relevant nahi the.