of a national programme to improve ventaliation at station platforms. On 29 June 2018, the Land Transport Authority (LTA) announced that the EWL overrun viaducts would be extended by . A new crossover, in conjunction with the implementation of communications-based train control (CBTC), will allow faster turnarounds for trains and segregation of platforms at the terminus. The station's operations will be unaffected by the works as the enhancement works will be done away from the station itself. In March 2019, the contract for the construction of new overrun and crossover tracks was awarded to China Civil Engineering Construction Corporation Branch Office Singapore / Gates PCM Construction Ltd (JV). The S$56.7 million (US$ million) contract included the partial removal of existing overrun tracks. Construction commenced in 2019 and will be completed by mid 2024. Cross Island Line On 17 January 2013, transport minister Lui Tuck Yew announced that the proposed Cross Island line (CRL) will serve the Pasir Ris area. On 25 January 2019, the LTA confirmed that Pasir Ris station will be an interchange with the CRL. The CRL station will be constructed as part of Phase 1, consisting of 12 stations between Aviation Park and Bright Hill, and was expected to be completed in 2029. On 10 March 2020, it was announced that this station will serve as the eastern terminus for the CRL extension to Punggol station. The Punggol extension, consisting of four stations between this station and Punggol, was expected to be completed in 2031. However, the restrictions imposed on construction works due to the COVID-19 pandemic has led to delays and the dates was pushed by one year to 2030 and 2032 for CRL1 and CRLe respectively. The contract for the design and construction of Pasir Ris CRL Station and associated tunnels was awarded to a joint venture between Daewoo Engineering & Construction Co Ltd and Dongah Geological Engineering Co Ltd Singapore Branch at S$980 million (US$ million) on 26 April 2021. Construction was scheduled to begin in the fourth quarter of 2021, with expected completion in 2030. Incident On 22 March 2016, two SMRT maintenance trainees were run over and killed by an incoming C151 train at around 11:10am. They were part of a team of 15 personnel tasked to investigate a possible signalling system fault, after a high voltage alarm set off. The incident took place at the track switch away from the station.