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