Pic 1 to 8 I think NDLS se nikalne ke baad Jo Curve hai waha par capture kiya gaya hai. After departing NDLS you get this Curve then from Tilak Bridge you get Straight way.
I observed it in 2010 to 2014 from SDAH Duronto, SDAH Rajdhani and Howrah Rajdhani. Woh curve mein both direction mein(Up and Down) sab trains ki speed slow ho jaati hai.