org.opentrafficsim.road.gtu.lane.tactical

Class LaneBasedGTUFollowingLaneChangeTacticalPlanner

java.lang.Object

org.opentrafficsim.road.gtu.lane.tactical.AbstractLaneBasedTacticalPlanner

org.opentrafficsim.road.gtu.lane.tactical.LaneBasedGTUFollowingLaneChangeTacticalPlanner

All Implemented Interfaces:

Serializable, org.opentrafficsim.core.gtu.plan.tactical.TacticalPlanner

public class LaneBasedGTUFollowingLaneChangeTacticalPlanner
extends AbstractLaneBasedTacticalPlanner

Lane-based tactical planner that implements car following behavior and rule-based lane change. This tactical planner retrieves the car following model from the strategical planner and will generate an operational plan for the GTU.

A lane change occurs when:

1. The route indicates that the current lane does not lead to the destination; main choices are the time when the GTU switches to the "right" lane, and what should happen when the split gets closer and the lane change has failed. Observations indicate that vehicles if necessary stop in their current lane until they can go to the desired lane. A lane drop is automatically part of this implementation, because the lane with a lane drop will not lead to the GTU's destination.
2. The desired speed of the vehicle is a particular delta-speed higher than its predecessor, the headway to the predecessor in the current lane has exceeded a certain value, it is allowed to change to the target lane, the target lane lies on the GTU's route, and the gap in the target lane is acceptable (including the evaluation of the perceived speed of a following GTU in the target lane).
3. The current lane is not the optimum lane given the traffic rules (for example, to keep right), the headway to the predecessor on the target lane is greater than a certain value, the speed of the predecessor on the target lane is greater than or equal to our speed, the target lane is on the route, it is allowed to switch to the target lane, and the gap at the target lane is acceptable (including the perceived speed of any vehicle in front or behind on the target lane).

This lane-based tactical planner makes decisions based on headway (GTU following model). It can ask the strategic planner for assistance on the route to take when the network splits.

Copyright (c) 2013-2015 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

$LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $, initial version Nov 25, 2015

Author:

Alexander Verbraeck, Peter Knoppers

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LaneBasedGTUFollowingLaneChangeTacticalPlanner() Instantiated a tactical planner with just GTU following behavior and no lane changes.

Method Summary

Modifier and Type	Method and Description
(package private) AccelerationStep	calculateAcceleratonStep(LaneBasedGTU laneBasedGTU, LanePerception perception, HeadwayGTU headwayGTU, org.djunits.value.vdouble.scalar.Length.Rel maxDistance) Calculate the AccelerationStep given a GTUFollowing model for a given headway.
org.opentrafficsim.core.gtu.plan.operational.OperationalPlan	generateOperationalPlan(org.opentrafficsim.core.gtu.GTU gtu, org.djunits.value.vdouble.scalar.Time.Abs startTime, DirectedPoint locationAtStartTime)

Methods inherited from class org.opentrafficsim.road.gtu.lane.tactical.AbstractLaneBasedTacticalPlanner

buildLaneListForward, buildLaneListForward, buildLinkListForward, connectsToPath, determineNextSplit, getReferenceLane

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LaneBasedGTUFollowingLaneChangeTacticalPlanner

public LaneBasedGTUFollowingLaneChangeTacticalPlanner()

Instantiated a tactical planner with just GTU following behavior and no lane changes.

Method Detail

generateOperationalPlan

public org.opentrafficsim.core.gtu.plan.operational.OperationalPlan generateOperationalPlan(org.opentrafficsim.core.gtu.GTU gtu,
                                                                                            org.djunits.value.vdouble.scalar.Time.Abs startTime,
                                                                                            DirectedPoint locationAtStartTime)
                                                                                     throws org.opentrafficsim.core.gtu.plan.operational.OperationalPlanException,
                                                                                            org.opentrafficsim.core.network.NetworkException,
                                                                                            org.opentrafficsim.core.gtu.GTUException

Throws:

org.opentrafficsim.core.gtu.plan.operational.OperationalPlanException

org.opentrafficsim.core.network.NetworkException

org.opentrafficsim.core.gtu.GTUException

calculateAcceleratonStep

AccelerationStep calculateAcceleratonStep(LaneBasedGTU laneBasedGTU,
                                          LanePerception perception,
                                          HeadwayGTU headwayGTU,
                                          org.djunits.value.vdouble.scalar.Length.Rel maxDistance)
                                   throws org.opentrafficsim.core.gtu.GTUException

Calculate the AccelerationStep given a GTUFollowing model for a given headway.

Parameters:

laneBasedGTU - the GTU to calculate the acceleration step for

perception - the perception of the GTU

headwayGTU - the headway and GTU that is our predecessor

maxDistance - the maximum distance to drive, e.g. due to a lane drop

Returns:

the acceleration step

Throws:

org.opentrafficsim.core.gtu.GTUException - when the velocity of the GTU cannot be determined