According to sources, six bidders including IRB Infrastructure, were in the fray for the assignment where it has emerged as the winner. The other five companies were Ashoka Buildcom, ILFS, Essel Infra, Patel Infra and Reliance Infrastructure.
The existing concessionaire for the country's first expressway is IRB Infrastructure.
Sources said the rate of return for IRB Infra is likely to be be less than 2 per cent.
Maharashtra State Road Development Corporation (MSRDC) had invited financial bids from the six qualified companies and the last date for bid submissions was yesterday.
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The company had purchased toll collection rights with an upfront payment of Rs 918 crore in 2004 and has a 15-year concession period valid till August 8, 2019.
It also collects toll at four points on the old Mumbai- Pune highway at Sheelphata, Dehu Road, Shedung and Kusgaon.
As per the sources, the winning concession period for the current contract is 8 years and 10 months.
MSRDC also received sanction from the National Highways Authority of India for road-widening on certain stretches at Nigdi, Dehu and Panvel of the expressway.