A projection system used in a vehicle park assist system, the projection system projects a trajectory indicator to provide a visible representation of a vehicle trajectory. The projection system comprises a parking beacon 5 having a light source 29 operable to emit light and image forming means 30 for forming the trajectory indicator 31 and a parking location indicator 26. A processor (34, fig 2) is provided for controlling the image forming means 30. The processor (34) is configured to determine a vehicle trajectory and, in dependence on the determined vehicle trajectory, to control the image forming means 30 to control the light emitted from the light source 29 to form the trajectory indicator 31. The projection system may be part of a park assist system for a vehicle towing, for example, a trailer. Reference is also made to a vehicle, a parking beacon and a method.
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