Can Phoenix become a transit city? It’s looking like more and more of a possibility lately.

Phoenix’s Metro light rail system is less than six years old but has already surpassed ridership projections for 2020. The system is carrying 48,000 passengers a day, or 22,000 more than initially projected, according to the Arizona Republic. Extensions of the system, which currently has 20 miles of track and 28 stations, are already underway and eagerly anticipated in Phoenix and the suburb of Mesa.

Phoenix Mayor Greg Stanton isn’t about to stop there. He wants to triple the size of the system by 2030. Business and civic leaders will convene soon to develop an expansion plan to bring to voters next year. The team will be headed by Mary Peters, U.S. transportation secretary under President George W. Bush, the Republic reports.

Phoenix has also been trying to make the neighborhoods around the rail system more conducive to riding it. The city used about $3 million in funds from the Obama administrations’ Sustainable Communities Program to plan for transit-oriented development around the system’s stations. The blueprint, called Reinvent Phoenix, lays out incentives and zoning rules to encourage walkable development around the stations.