Calgary Transit ordered 38. Starting in late 2017, Calgary has been sending SD-160s to Sacramento for mid-life refurbishment. The refurbished units contain several components and electronics already present on the S200, the successor to the SD-160. Along with some electronic improvements, they have been upgraded to be compatible with Calgary's newer SD-160s, which were previously incompatible due to software differences. The refurbished fleet will eventually start to run with the newer units once the software has been adjusted to allow seamless operation. Technical details The SD-160's dimensions are by by and can be joined together to form trains of up to six cars in length. It is powered by four AC motors which provide a maximum of 580 kW and a maximum speed of . It accelerates at and decelerates at , with emergency braking deceleration of . The brakes also serve as a generator, regenerating power back to a city's electrical lines. The SD-160 has a passenger capacity of 236 passengers (standing) with 64 seats. Compared to its predecessor, the Siemens–Duewag U2, the SD-160's driver's cabin is significantly larger, but its total length is still less than , allowing three vehicles to be combined and still be under the maximum length of a German streetcar train assembly. Each vehicle also features an onboard closed-circuit TV security camera system for increased passenger safety. Unlike the Siemens SD-100, the Siemens SD-160 does not use the bi-folded doors, instead using sliding doors similar to designs featured on the Siemens S70. In addition, both can be used together in mixed trains consisting of SD-100s and SD-160s. The new, streetcar-length S70 cars ordered for San Diego are designed to be compatible with the SD-100, allowing the SD-100 to operate in a mixed consist, sandwiched between two S70 cars. The SD-160NG for Calgary have been taking over some features from the SD-460 series including IGBT equipment. Operators See also Siemens–Duewag U2 Siemens SD-400 Siemens SD-460 References External links Siemens tram vehicles Tram vehicles of Canada Electric multiple units of the United States 600 V DC multiple units 750 V DC multiple units Light rail vehicles Electric multiple units of Canada Siemens multiple units Articulated passenger trains