Chengalpattu to Tindivanam, India
Independent Engineers Services for Rehabilitation and Up gradation from Km 28/0 to Km 67/0 and 4-laning of existing 2-lane road from Chengalpattu to Tindivanam (from Km 67/0 to km 121/0) including Strengthening and Up-gradation of existing two lanes from Tambaram- Tindivanam section of NH-45 under Build-Operate and Transfer (BOT) on Annuity basis, Tamil Nadu, India
NH-45 (popularly known as GST Road) is one of the important National Highways, which connects Chennai, the Capital City of Tamil Nadu with the southern districts of the State, including major towns such as Tiruchi, Madurai, etc. This National Highway has been entrusted to National Highways Authority of India (NHAI) for development and maintenance. NHAI has taken up the project road from km 28/0 (starting from Tambaram at the outskirts of Chennai City) to km 121/0 (Tindivanam Junction) for development under the Annuity Scheme. Total length of the project road is 93 kms. Out the above, Tambaram- Chengalpattu section from Km 28/0 to Km 67/0 has already been 4-laned and the remaining section from Km 67/0 (Chengalpattu) to Km 121/0 ( Tindivanam) is presently 2-lane road.The project work involves strengthening of the existing 4-lane section from Tambaram to Chengalpattu (from Km 28/0 to Km 67/0) and 4-laning of existing 2-lane road from Chengalpattu to Tindivanam (from Km 67/0 to km 121/0).Some of the bridges are:
| Sr. No. | Bridge (Name) | Bridge Type | Span Arrangement | Total Length |
| 1 | Nandivaram Bridge | RCC Solid Slab | 1*8.6 | 8.62 m |
| 2 | Thailvaram bridge | RCC Solid Slab | 1*8.6 | 8.62 m |
| 3 | Minor bridge | RCC Solid slab | 7+7.4+7 | 21.42 m |
| 4 | Minor bridge | RCC T beam+ RCC Solid slab | 25+7.5 Skew Bridge | 32.55 m |
| 5 | Minor bridge | RCC Solid slab | 9+7.5+9 Skew Bridge | 25.53 m |
| 6 | Kolavai Tank Bridge | RCC T beam+ RCC Solid slab | 5*12 Skew Bridge | 60.03 m |
| 7 | Minor bridge | RCC T beam+ RCC Solid slab | 1*18.9 | 18.92 m |
| 8 | Palar RiverBridge | PSC T beam+ RCC Solid slab | 23*29.5 | 678.55 |
| 9 | Kattu Odai Bridge | RCC Solid Slab | 1*8.6 | 8.62 m |
| 10 | Kalliar | RCC Solid Slab | 10.9+14*11+10.9 | 175.80 m |
| 11 | Maduran Tangan Bund Supply Channel | RCC Solid Slab | 2*8.4 Skew bridge | 16.8 m |
| 12 | Omahatki Temple Subway | RCC Solid Slab | 1*7.04 | 7.04 m |
| 13 | Minor Bridge | RCC Solid Slab | 4*11.5 | 46 m |
| 14 | Chunambedu Bridge | RCC T beam+ RCC Solid slab | 13.1+2*13+13.1 | 52.2 m |
| 15 | Ongur River | RCC T beam+ RCC Solid slab | 4*13 | 52 |