open on 7 November that year. In an effort to familiarise people with the system, the station opened for a preview from 24 to 25 October. As announced, the station was one of the first MRT stations on the network to be opened for service on 7 November 1987. Circle MRT line and further upgrades (2008-09) Contract C825A for the design, construction and completion of Bishan interchange station was awarded to Econ Corporation Ltd and Eng Lim Construction Co Pte Ltd Joint Venture at a sum of in July 2003. The contract also included upgrading the NSL station. Construction was slated to start in the third quarter of 2003 and was expected to be completed by early 2008. The original NSL station underwent major alterations to handle increased passenger traffic when the CCL station opened. A new air-conditioned platform to serve southbound trains to Marina South Pier was constructed to increase the passenger capacity of the station from 1,250 to 2,020. The new platform, Platform B, opened for service on 27 July 2008. As the original platform, now serving northbound trains to Jurong East, remained in service, upgrading works for the platform (Platform A) were hindered and took about a year to complete. While the re-tiling of the platform was done during the day, the Platform Screen Doors (PSDs) were installed in sections through the night. An air-conditioning system was also installed as part of the upgrade. Upgrading works for the platform were fully completed on 23 May 2009. An additional entrance to the basement of Junction 8 was also built. Along with the other Stage 3 CCL stations, the CCL station was opened on 28th of that month. Due to the close proximity of a nearby tunnel portal to residential apartment blocks, the installation of tall barriers stretching in length started in September 2011 and was completed by the second quarter of 2012. These are insulated with noise absorptive materials such as rock wool, which helped reduce noise volume by about 5 decibels. The NSL station underwent another upgrade in 2016 with the repositioning of seats at the platforms to allow more space and seats for commuters. Incidents On 28 July 2004, a 31 year old accountant died after falling on the track in front of an oncoming train at this station, disrupting northbound train services for an hour. On September 15 the same year, an elderly man was