couldChangeLane(string, int) -> bool
        Return whether the vehicle could change lanes in the specified direction

def couldChangeLane(self, vehID, direction):
        """couldChangeLane(string, int) -> bool
        Return whether the vehicle could change lanes in the specified direction
        """
        state = self.getLaneChangeState(vehID, direction)[0]
        return state != tc.LCA_UNKNOWN and (state & tc.LCA_BLOCKED == 0)