Bengaluru- Mysuru section: SW- I: Additional vent way to Bridge No. 572 at km 55/ 200- 300 in CPT Yard- Existing 1x2. 40x1. 2m RCC Box. Proposed- 1 x 3. 0m x 2. 0m ( 26. 11m barrel ) RCC box by launching method in ADEN/ MYA sub division. SW- II: Replacement of steel girder with PSC slabs of size above 9. 15m and up to 12. 20m span bridges for bridge no. 448 at Km 8/ 398 between NHY- GNN stations of Bengaluru- Mysuru section ( Total 19 Bridges ). SW- III: Proposed fixing of sign boards on approaches of Bridges ( 29Nos ) Br. No. 448dn, 583dn, 610up, 627up & dn of SBC- MYS section = 5Bridges. Maintenance period is 6 months. ( Composite work )