Trajectory planning for an autonomous vehicle is disclosed. A method for planning a trajectory for an autonomous vehicle includes determining a coarse driveline from a first location to a second location; determining a strategic speed plan for the coarse driveline; removing lateral discontinuities in the coarse driveline based on the strategic speed plan to generate an adjusted coarse driveline; and generating lateral constraints around the adjusted coarse driveline and a discrete-time speed plan based on observed objects.