India\u2019s largest natural gas pipeline operator has invited users to book surplus network capacity online as the country prepares to create a distribution hub that sets benchmark prices. State-run GAIL India Ltd., which controls 70 percent of the nation\u2019s network, on Monday launched a website for online bookings of pipeline capacity to ship gas across the country. GAIL, with 11,400 kilometers (7,084 miles) pipelines, is investing 250 billion rupees ($3.6 billion) to add another 5,000 kilometers, Chairman Bhuwan Chandra Tripathi said. Greater sharing of infrastructure will allow quicker trading and movement of natural gas supplies and boost utilization of GAIL\u2019s pipelines. India, home to some of the world\u2019s most polluted cities, is seeking to cut emissions and its oil import bill by doubling the share of gas in the energy mix to 15 percent. \u201cThis is going to pave the foundation for the gas hub,\u201d Tripathi said. \u201cThe online booking allows transparent and hassle-free access and increases the ease of operations, and pushes the country toward a gas-based economy.\u201d Why Gas-Gorging Asia Wants an End to Faraway Pricing: QuickTake GAIL already has more than a hundred customers using its pipeline network on an open-access basis. Once the gas hub is operational, it will increase utilization of the company\u2019s pipelines, which are operating at half capacity, Tripathi said. The Petroleum and Natural Gas Regulatory Board, which has been tasked with setting up the gas-trading exchange, expects the hub to be operational by December. India\u2019s cabinet of ministers is expected to approve the gas exchange plan \u201csoon,\u201d Oil Minister Dharmendra Pradhan said Monday, without elaborating.