Realty firm DLF and Haryana Urban Development Authority (HUDA) have joined hands to construct a 16-lane road covering 8.3 km in Gurgaon at an investment of up to `600 crores to ease heavy traffic in the city.

DLF, instrumental in development of major part of Gurgaon, has signed an agreement with HUDA for upgradation of road from NH-8 toll plaza to Sector 55-56, sources said.