MUMBAI: Around 8.5 crore commuters have travelled by Metro during the past 11 months since beginning of commercial operation on 8 June last year, Mumbai Metro One Pvt Ltd (MMOPL) said here today. During the past 11 months since beginning of commercial operation on 8 June, 2014, around 8.5 crore commuters travelled by Metro, which maintained 99 per cent service efficiency in 110,000 trips, an MMOPL, a subsidiary of Reliance Infrastructure, release said. Meanwhile, MMOPL has tied up with several retailers in a bid to offer a unique shopping experience to its commuters. The smart card users of Mumbai Metro, would be able to get into a shopping spree on the 11.4 km long metro corridor connecting Versova with Ghatkopar via Andheri from 1 June onwards. They would be able to enjoy discounts and offers while shopping at several retail outlets along Versova- Andheri-Ghatopar (VAG) corridor just by displaying their smart travel cards at the retail counters, the release said.