For the first year, the delivery includes 15 vehicles of the type «lighTram¹⁹», with a length of 18,7m and a value of approximately 17,5 Mio CHF. The 15 vehicles are equipped with the Dynamic-Charging-Technology. This technology allows the recharge on partial overhead lines. In the following five years, the frame contract provides the delivery of up to 35 further vehicles, including also the double articulated bus of the type «lighTram²⁵», with a length of 24.7m and space for up to 220 passengers. During the tendering phase, the vehicles were absolutely convincing due to their excellent price/performance ratio.

Thanks to their attractive design, spacious standing surfaces for the passengers and ergonomic workplaces, the vehicles set new standards in bus services. An innovative energy management allows a lighter vehicle construction and therefore a larger number of passengers than it was possible for the former trolleybuses. Moreover, they consume less energy than conventional trolleybuses – this entirely in line with the energy strategy of the Swiss Confederation as well as of the European Union.

HESS vehicles and their energy management reduce peak loads in the electricity grid which minimizes cost for transport services. In addition, they offer a higher flexibility, such as for the temporary bypassing of construction sites. They also optimize traffic accessibility in agglomerations where the construction of an overhead line would not be economical or in protected urban zones where overhead lines are not welcome.

What started in 1940 with the construction of simple overhead line buses has evolved into highly complex e-bus systems.