rolling stock fleet. The first car was delivered in September 2005, with a total number of 20 trams ordered from Bombardier, with an option for a further 23 vehicles. The GT8N-1 is the second generation of low-floor tramcars in Bremen. Its task is to replace older GT4 Wegmann vehicles and to provide increased comfort for BSAG passengers. Therefore, several changes were made compared to the older GT8N low-floor cars. The width of the car has been increased to 2.65 m, which makes the interior more spacious and allows the introduction of four seats abreast; altogether 106 seats are available. Passenger air-conditioning has also been installed, while five low-floor doorways and a lift for disabled passengers facilitate entry for all passengers. The vehicle has an overall length of 35,400 mm and a maximum speed of 70 km/h. It consists of three sections with a total of four bogies. Two of these support the middle section of the car, while the two end sections are carried by a bogie each. The end section bogies are driven, which is why it was not possible to create a low floor above them as elsewhere in the car. Altogether the GT8N-1 is 74% low floor. The GT8N-1 is based on Bombardier's FLEXITY Classic modular tramcar concept. Vehicles of this type run in several cities in Germany as well as in Poland and Australia. The first car of this family was the 8NGTW, delivered in 1997 to KVG Kassel. The Bremen version is uni-directional for use on BSAG's tram network. A possible future variant would be a similar but bi-directional, dual-system vehicle that could also be used on DB tracks and so could connect BSAG's inner-city tram network with railway lines. Earlier GT4 The oldest vehicles in active service until 2013 were the articulated tramcars of types GT4d, GT4e and GT4f and the matching trailers of types GB4d, GB4e and GB4f. The vehicles were built between 1973 and 1977 by Wegmann & Co. in Kassel. Of the 61 trams and 57 trailers originally delivered, four GT4f vehicles are still in service, though limited to driver training purposes and other special occasions. The rest have been scrapped or delivered to Timișoara in Romania. Historic BSAG cars In Bremen some historic tram cars still exist: car Nr. 49 from 1900 (the only car which is only allowed to operate without passengers) car Nr. 134 from 1904 (the only