Executive Summary Project Background The Ministry of Road Transport & Highways, MORT&H, Government of India has decided to take up the development of various National Highway Corridors for augmentation of capacity for safe and efficient movement of traffic by widening to 4/6 lanes. One such set of corridors is 10,000 km of NHDP-III spread over the country. National Highways Authority of India (NHAI) has been entrusted to implement the development projects for these selected stretches/ corridors either through public-private partnership (PPP) basis or its own budgetary sources or loans from ADB, World Bank or any such organisation. The stretch of 131.55km on NH 45 Ext,NH 49 Ext & NH 220. i.e. from km 2+750 (at NH7 Junction) to km 73+400(at Theni), NH 49E from Km 77+200 to Km 80+000 and NH 220 from Theni (km 273+600) to Kumili (km 215+500) in the state of Tamilnadu is a part of the NHDP-III projects M/s Wilbur Smith Associates Inc. USA in joint venture (JV) with Wilbur Smith Associates Private Limited have been entrusted by NHAI the task of carrying out the Feasibility Studies and preparation of Detailed Project Report including Environmental and Social Impact Assessment for rehabilitation and upgrading to 4/6 lane divided highway. Project Description ‘ The project road stretch is located in the state of Tamilnadu. The stretch starts from NH 7 junction at Dindigul and extends upto Kumili on Western Ghat mountain. The project roads connects Dindigul, one of the important city in Tamil Nadu to Kumili, the border town of Tamilnadu and Kerala. It passes through Dindigul and Theni Districts. It also forming an important link connecting Wstern districts of Tamilnadu such as Madurai, Trichy, Karur and Coimbatore from Dindigul. NH-45 Ext links to Northern, Eastern and southern districts of Tamilnadu via. NH-45,NH-209, NH-7 and NH49Ext. The salient proposals for up gradation and improvement of the NH45 E and NH 220 are classified into the following engineering aspects. • Widening of the project road into 4 lane configurations based on traffic capacity. • Improving the horizontal and vertical geometry of the existing road based on the design standards Including realignment where ever justifiable. • Design of pavement for widening and strengthening of the existing road. • Improvement of all major and minor intersections. • Rehabilitation and widening of the existing structures including bridges, culverts, ROBs, underpasses, grade separators etc and design of new ones. • Provision of comprehensive road furniture for complete road safety. Widening Proposals Based on traffic considerations, geometric standards and existing site condition it is proposed to have the following configuration Wilbur Smith Associates Inc. USA E-1 In Joint Venture With Wilbur Smith Associates Pvt. Ltd. National Highways Authority of India Consultancy Services for Feasibility Study and Detailed Project Report Project Report for Dindigul-Theni (NH 45 Ext.) and Theni-Kumili (NH 220) Section Executive Summary in the state of Tamilnadu under NHDP Phase III (package No. NHDP III/DL5/01) Based on the above considerations and financial viability of the project, the widening proposal for the project stretch is summarized in the Table E.1 below Table E.1- Widening scheme for the project stretch Existing chainage Design Chainage Design Improvement scheme From To From To Length (km) 2+750 of 268+200 of 2+750 82+250 79.5 Four laning along the NH 45 Ext NH 220 design alignment. 215+500 222+400 215+500 222+323 6.823 Two laning with paved (NH 220) (NH 220) shoulder with minor geometric improvement on hill section 222+400 234+800 222+400 235+100 12.700 Two laning with paved (NH 220) (NH 220) shoulder with geometric improvement along the design alignment 234+800(NH 268+200(NH 235+100 269+725 34.625 Four laning along the 220) 220) design alignment except for cumbum bypass where two laning along the bypass alignment and maintenance of existing road. Four Lanning - • Median: 4.5m • Median Shy away: 0.50m. • Shy away at Divider: 0.25m. • Main Carriageway in each direction: 7.0m (2 x 3.5m Lane). • Service Road at major built ups in both directions: 7m. • Paved Shoulder: 1.5m • Earthen Shoulder: 2.0m • Earthen Drain of suitable dimension • Proposed Right of Way: 60 m Two Lanning- • Main Carriageway in each direction: 3.5 m. • Paved Shoulder: 1.5m • Earthen Shoulder: 2.0m, 1.0m ( For Ghat Section) • Proposed Right of Way: 30 m for Ghat Section and 60 m for others Typical Cross Sections The Consultants have proposed a Row of 60 m and 30 ( Ghat Section ) based on settlement pattern & Land-use, Nature of built-up & Details of socially sensitive structures. Widening options for the project road were arrived at based on, • Lane requirements based on traffic capacity analysis. • Requirement of service roads along built-up areas. Wilbur Smith Associates Inc. USA E-2 In Joint Venture With Wilbur Smith Associates Pvt. Ltd. National Highways Authority of India Consultancy Services for Feasibility Study and Detailed Project Report Project Report for Dindigul-Theni (NH 45 Ext.) and Theni-Kumili (NH 220) Section Executive Summary in the state of Tamilnadu under NHDP Phase III (package No. NHDP III/DL5/01) Lengths of project road under various cross sections are summarized in Table E.2. Table E.2: Summary of Typical Cross Sections Sl. No Widening Type/ CS Length in m 1 Four laning by concentric widening at Rural stretches (FL – 1R) 7.9 2 Four laning by widening on Left Side at Rural stretches (FL – 2R) 26.59 4 Four laning by widening on Right Side at Rural stretches (FL – 3R) 16.32 5 Four laning by new construction at Rural stretches (FL – 4R) 50.22 Two laning with paved shoulder, with provision for four laning on Left 6 Side at Rural Stretches (TL – 2R) 5.46 Two laning with paved shoulder, with provision for four laning on Right 7 Side at Rural Stretches (TL – 3R) 0.25 Two laning scheme by construction which will be widened into Four 8 lane in Stage II (TL – 4R) 8.12 9 Four laning with service roads at Built up stretches (FL – 5B) 12.28 10 Two laning by LHS/RHS widening in hilly terrain (TL – 2H) 6.10 11 Two laning by new construction in hilly terrain (TL – 4H) 0.40 Total 133.65 Typical cross sections are shown in E.1 to Figure E.10. Wilbur Smith Associates Inc. USA E-3 In Joint Venture With Wilbur Smith Associates Pvt. Ltd. National Highways Authority of India Consultancy Services for Feasibility Study and Detailed Project Report Project Report for Dindigul-Theni (NH 45 Ext.) and Theni-Kumili (NH 220) Section Executive Summary in the state of Tamilnadu under NHDP Phase III (package No. NHDP III/DL5/01) PROPOSED ROW 60000 30000 30000 500 500 SHYAWAY SHYAWAY 7000 7000 2000 1500 CARRIAGE WAY 4500 CARRIAGE WAY 1500 2000 MEDIAN 500 500 EXISTING CARRIAGE WAY WIDTH 7m PRCL SHOULDER SHOULDER PAVED PAVED SHOULDER SHOULDER SELECTED EARTH FILL EARTHEN 3% 3% EARTHEN SELECTED EARTH FILL 3% 2% 2% 3% UNLINED DRAIN 2 2 UNLINED DRAIN 1 1 G.L. G.L. 2 2 2 2 1 1 1 1 BITUMINOUS CONCRETE DENSE BITUMINOUS MACADAM DENSE BITUMINOUS MACADAM PROFILE CORRECTIVE COURSE WET MIX MACADAM LAYER 2 EXISTING PAVEMENT WET MIX MACADAM LAYER 1 GRANULAR SUB BASE DRAINAGE LAYER SUBGRADE Figure E.1 : Typical Four Laning By concentric Widening At Rural Stretches. (Type FL-1R) PROPOSED ROW 60000 30000 30000 CL 7000 500 SHYAWAY 500 SHYAWAY 7000 500 500 2000 1500 CARRIAGE WAY 4500 CARRIAGE WAY 1500 2000 MEDIAN EXISTING CARRIAGE WAY SHOULDER PAVED PAVED SHOULDER SHOULDER EARTHEN SHOULDER 3% 3% EARTHEN SELECTED EARTH FILL SELECTED EARTH FILL 3.5% 2.5% 2.5% 3.5% UNLINED DRAIN 2 2 UNLINED DRAIN 1 1 G.L. G.L. 2 2 2 2 1 1 1 1 BITUMINOUS CONCRETE DENSE BITUMINOUS MACADAM BITUMINOUS CONCRETE WET MIX MACADAM DENSE BITUMINOUS MACADAM GRANULAR SUB BASE PROFILE CORRECTIVE COURSE DRAINAGE LAYER EXISTING PAVEMENT SUBGRADE Figure E.2: Typical Four Laning By Widening On Left Side At Rural Stretches . (Type FL-2R) Wilbur Smith Associates Inc. USA E-4 In Joint Venture With Wilbur Smith Associates Pvt. Ltd. National Highways Authority of India Consultancy Services for Feasibility Study and Detailed Project Report Project Report for Dindigul-Theni (NH 45 Ext.) and Theni-Kumili (NH 220) Section Executive Summary in the state of Tamilnadu under NHDP Phase III (package No. NHDP III/DL5/01) PROPOSED ROW 60000 CL 30000 30000 7000 500 SHYAWAY 500 SHYAWAY 7000 500 2000 1500 CARRIAGE WAY 4500 CARRIAGE WAY 1500 2000 500 MEDIAN EXISTING CARRIAGE WAY SHOULDER SHOULDER SHOULDER PAVED SHOULDER PAVED EARTHEN SELECTED EARTH FILL EARTHEN 3% 3% SELECTED EARTH FILL 3.5% 2.5% 2.5% 3.5% UNLINED DRAIN 2 2 UNLINED DRAIN 1 1 G.L. G.L. 2 2 2 2 1 1 1 1 BITUMINOUS CONCRETE BITUMINOUS CONCRETE DENSE BITUMINOUS MACADAM DENSE BITUMINOUS MACADAM WET MIX MACADAM PROFILE CORRECTIVE COURSE GRANULAR SUB BASE EXISTING PAVEMENT DRAINAGE LAYER SUBGRADE Figure E.3 Typical four laning by widening on right side at rural stretches (Type FL-3R) PROPOSED ROW 60000 CL 30000 30000 500 500 SHYAWAY SHYAWAY 7000 7000 500 2000 1500 CARRIAGE WAY 4500 CARRIAGE WAY 1500 2000 500 MEDIAN PR CL SHOULDER PAVED SHOULDER SHOULDER EARTHEN EARTHEN SHOULDER 3% 3% SELECTED EARTH FILL PAVED SELECTED EARTH FILL 3.5% 2.5% 2.5% 3.5% 2 2 UNLINED DRAIN 1 1 UNLINED DRAIN G.L. G.L. 2 2 2 2 1 1 1 1 BITUMINOUS CONCRETE DENSE BITUMINOUS MACADAM WET MIX MACADAM GRANULAR SUB BASE DRAINAGE LAYER SUBGRADE Figure E.4 Typical Four Laning Scheme By New Construction At Rural Stretches (Type FL- 4R) Wilbur Smith Associates Inc.