increase average vehicle speed for routes running from New Taipei into Taipei. Property prices along metro routes (both new and existing) tend to increase with the opening of more lines. Since the Taipei Metro joined the Nova International Railway Benchmarking Group and the Community of Metros (Nova/CoMET) in 2002, it has started collecting and analysing data of the 33 Key Performance Indicators set by Nova/CoMET in order to compare them with those of other metro systems around the world, as a reference to improve its operation. Taipei Metro also has gained keys to success from case studies on different subjects such as safety, reliability, and incidents, and from the operational experiences of other metro systems. According to a study conducted by the Railway Technology Strategy Center at Imperial College London, and data gathered by Nova/CoMET, the Taipei Metro has ranked number 1 in the world for four consecutive years in terms of reliability, safety, and quality standards (2004–2007). The most congested route sections handle over 38,000 commuters per hour during peak times. On New Year's Eve 2009 and New Year's Day 2010, the Metro system transported 2.17 million passengers in 42 consecutive hours. On 22 April 2010 after 14 years of service, the system achieved the milestone of 4 billion cumulative riders. On 29 December 2010, the system passed the benchmark of 500 million annual passengers for the first time. The record for single day ridership hit 2.5 million passengers during the New Year's Eve celebrations on 31 December 2010. Following opening of the Xinyi section of , the system reached another record of 2.75 million passengers on 31 December 2013. In May 2016, the Singapore Transport Minister, Khaw Boon Wan, said that his country's rail operators, SBS Transit and SMRT, should emulate the example of Taipei Metro. Speaking at a rail engineering forum, he cited the Taipei Metro's timely maintenance and replacement of assets, as well as its fast response to rail network problems. Khaw said the Singapore Land Transport Authority (LTA) is working with the TRTC to attach staff from SBS and SMRT to its metro workshops, so they can learn from its asset maintenance practices and engineering improvements. Future expansions Several lines are planned to be added to the network. Wanda–Zhonghe–Shulin line (Light Green line) Wanda–Zhonghe–Shulin is a metro line under construction. Phase 1 will run from to Juguang, Zhonghe, New Taipei. Phase 2 will connect Zhonghe