On August 16, 2010, the NHAI and ITCTPL entered into a concession agreement in respect of the Tumkur–Chitradurga NH 4 Project. ITCTPL was engaged to expand a 114.00 km section of NH 4 between Tumkur and Chitradurga in Karnataka from four to six lanes on a BOT basis in the DBFOT format. Construction on the project commenced on June 4, 2011. ITCTPL received a provisional certificate of completion on July 4, 2014.
As per the relevant concession agreement, the Tumkur–Chitradurga NH 4 Project comprises the section of NH 4 from km 75.00 to km 189.00. According to the Traffic Reports, the project features:
• 114.45 km of six-lane carriageway
• 4.2 km of service road
• 3 major bridges
• 21 minor bridges
• 6 flyovers
• 147 culverts • 20 pedestrian underpasses
• 36 major intersections
• 66 entry / exit ramps
• 38 bus bays
• 7 truck lay byes
• 2 toll plaza complexes