Abstract: A method for planning a target trajectory for an autonomously operated vehicle to be travelled along involves determining a discrete set of trajectories as candidates for the target trajectory. Each of the trajectories is composed of a plurality of trajectory sections arranged in a row. The planning is based on a selection of one of the trajectories as a target trajectory. The selection is based on evaluation of the trajectories together with predefined cost functions and an identification of the trajectory evaluated as being the most cost effective. An array of sub-trajectories, each having the same location specifications and different dynamics specifications, is associated with each trajectory section, and costs in accordance with the predefined cost functions are associated with the sub-trajectories.