RFP for Independent Engineer Services for 4 ( Four ) Laning and Greenfield alignment of Karimganj- Silchar section of NH- 37 from Design chainage 0. 000 ( Near ISBT, Silchar bypass ) to Km. 15. 970 ( Kalinagar Pt I on NH- 37 ) in the state of Assam on HAM mode. Package –I ( Length- 15. 970 km ) Assam on Hybrid Annuity Mode.