Abstract: There is disclosed a passenger service vehicle having an upper deck (100) and a lower deck (110), and a passenger staircase (400) extending between the upper deck and the lower deck. The staircase is positioned internal to the vehicle. In some examples, the staircase has at least an upper stair portion and a secondary stair portion, where the upper stair portion is connected to the upper deck and comprises at least one tread, and further connected to the secondary stair portion via an intermediate landing (420, 440), whereby the secondary stair portion extends parallel with respect to the length of the upper deck, and the upper stair portion extends transversely, and in some cases perpendicularly, with respect to the secondary stair portion. In some examples, the staircase comprises a lower stair portion. One embodiment envisages a U-shaped staircase. In some further examples, the staircase is described together with a fuel tank configuration.

Abstract: There is disclosed a passenger service vehicle having an upper deck (100) and a lower deck (110), and a passenger staircase (400) extending between the upper deck and the lower deck. The staircase is positioned internal to the vehicle. In some examples, the staircase has at least an upper stair portion and a secondary stair portion, where the upper stair portion is connected to the upper deck and comprises at least one tread, and further connected to the secondary stair portion via an intermediate landing (420, 440), whereby the secondary stair portion extends parallel with respect to the length of the upper deck, and the upper stair portion extends transversely, and in some cases perpendicularly, with respect to the secondary stair portion. In some examples, the staircase comprises a lower stair portion. One embodiment envisages a U-shaped staircase. In some further examples, the staircase is described together with a fuel tank configuration.