Hagestede. In future, the stop will be moved once again to its final location south of Passage at the street Weverstede. On 16 January 2021, overnight testing began on line 61 to IJsselstein-Zuid. On 28 February 2021, line 61 went into operation; however, passengers were allowed to ride line 61 trams only between Jaarbeursplein and Stadscentrum (Nieuwegein) and had to continue further south by bus. Line 61 trams ran between Stadscentrum and IJsselstein-Zuid as test runs operating according to a schedule but without picking up passengers. On 14 March 2021, line 61 fully reopened for passenger service between Jaarbeursplein and IJsselstein-Zuid. To compensate riders for the late reopenings, U-OV offered the public free trips for two weeks on both lines 60 and 61. On 22 October 2021, construction started to lengthen the platforms at the Jaarbeursplein tram stop in order to accommodate coupled trains with a length of 75 metres. After the platforms are lengthened, U-OV could start running trams with passengers in mid-2022 between Jaarbeursplein and Utrecht CS Centrumzijde. This would eliminate the 300-metre walk for passengers transferring between the SUNIJ and Uithof lines at Utrecht Centraal. Vehicles High-floor trams From 1983 to 2020, the SUNIJ-lijn used 27 single-articulated, high-floor trams built by Schweizerische Industrie Gesellschaft (SIG). These trams weighed 37.5 ton, were long and are capable of a maximum speed of . In 2012, the SIG-trams were renovated including bogies, air-conditioning, seats and repainting. The last run of the SIG trams was on 3 July 2020. On 4 July, the SUNIJ-lijn was fully shut down to renovate the line, and lower and lengthen its platforms to accommodate low-floor trams. The SIG-trams have been replaced by CAF low-floor trams. After the closure of the SUNIJ line, all SIG trams but one were scrapped. On 30 November 2020, SIG-tram 5017 was shipped along with spare parts to the Nederlands Transport Museum in Nieuw-Vennep for preservation. The museum intends to operate the tram carrying riders to attractions within Park 21, an event park under development in Haarlemmermeer. In 2008, Utrecht purchased trams built in the 1980s from Vienna at a cost of 837,000 euros. The Vienna trams (de Weense trams) were delivered to Utrecht in 2009. The trams required some adjustments before going into service. They received a new onboard computer and a mobile telephone to communicate with central dispatchers. Adjustments were required to tram doorways and the platform height. These