Widening of Road Embankment (Earth Work), Widening of Existing Pavement, Strengthening of existing Pavement, Raising of Existing Pavement, Road Surfacing by DBS, Construction of hard shoulder, Construction of Rigid Pavement, Road Median, 4-Lane RCC Box Culvert (06 Nos.) Widening of Existing Culvert (06 Nos.), RCC Retaining wall, RCC Plate palasiding, Road Road Side Drain, U-Drain cum Footpath, Sign Signal, KM Post, Road Marking, Road Intersection, Passanger shed & Bus bay etc. works at 13rd (p) to 22nd (p) KM (Ch. 12+500m to 21+800m) of 4-Laning improvement project of Chattogram-Rangamati National Highway (N-106) (Hathazari-Raozan Portion), Chattogram.