The 270-km distance takes over six hours by road now.
The Minister also said an "intelligent transport" system - with CCTV cameras installed to monitor the traffic rule violators - would be put in place on NH-8.
Speaking after laying the foundation stone for improvement work on three junctions on NH-8, at an estimated cost of Rs 1,005 crore, Gadkari said the work would be completed in 15 months instead of the originally planned 30.
On plans to ensure seamless traffic flow on NH-8, he said work on the flyover at IMT Manesar Chowk would be completed soon. He said four underpasses and as many flyovers would be constructed to make the traffic movement seamless.
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Gadkari said work on the Dwarka Expressway had commenced and it would be completed soon.
Chief Minister Manohar Lal Khattar urged him to get the 1.75-km stretch of this expressway, which falls in Delhi area, done quickly.
In addition, he assured to start construction work on the Manesar-Gurgaon bye-pass in near future. The pilot project of Metrino System between Dhaula Kuan in Delhi and Manesar had been cleared and work would be started soon, he said.
Gurgaon MP and Union Planning, Urban Development, Housing and Poverty Alleviation Minister, Rao Inderjeet Singh demanded waiving of the toll charges for the residents of Gurgaon at Kherki Daula Toll Plaza on the pattern of Gujarat.