org.opentrafficsim.road.gtu.lane.tactical.lmrs

Class LMRSsync

java.lang.Object

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

org.opentrafficsim.road.gtu.lane.tactical.lmrs.AbstractLMRS

org.opentrafficsim.road.gtu.lane.tactical.lmrs.LMRSsync

All Implemented Interfaces:

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

public class LMRSsync
extends AbstractLMRS

Implementation of the LMRS (Lane change Model with Relaxation and Synchronization). This is extended by:

• Tag-along behavior at low speed during synchronization, which prevents the driver from being overtaken as it waits for an acceptable gap. This occurs as the follower in the target lane starts accelerating before the potential lane changer does. As a result, the potential lane changer is overtaken. This process may occur sequentially letting the potential lane changer make small jumps and reaching standstill for every new leader. This significantly disturbs the acceleration process and thus queue discharge.
• Active gap selection, taking care of not stopping for synchronization upstream of the location where one can actually merge, and accounting for speed differences with the target lane. The result is synchronization by following a sensible leader in the target lane, rather than simply the direct leader in the target lane. A driver may also decide to reduce acceleration to get behind the follower in the target lane. If synchronization is determined to be impossible, the driver decelerates. Furthermore, speeds may be reduced to allow time for further lane changes.
• Courtesy lane changes, where the level of lane change desire of drivers in adjacent lanes towards the current lane, results in an additional lane change incentive towards the other adjacent lane. A factor p is applied to the lane change desire of the adjacent leader. Further leaders are considered less. The opposite is also applied. Leaders on the second lane to either direction that have desire to change to the first lane in that direction, result in a negative courtesy desire. I.e. leave adjacent lane open for a leader on the second lane.
• Gap-creation is changed by letting drivers reduce speed for any adjacent leader within a given distance, rather than only the direct leader. Furthermore, gaps are also created during lane changes, also for the adjacent lane of the target lane.

See Schakel, W.J., Knoop, V.L., and Van Arem, B. (2012), LMRS: Integrated Lane Change Model with Relaxation and Synchronization, Transportation Research Records: Journal of the Transportation Research Board, No. 2316, pp. 47-57. Note in the official versions of TRB and TRR some errors appeared due to the typesetting of the papers (not in the preprint provided here). A list of errata for the official versions is found here.

Copyright (c) 2013-2016 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Version:

$Revision$, $LastChangedDate$, by $Author$, initial version Apr 13, 2016

Author:

Wouter Schakel

See Also:

Serialized Form

Field Summary

Fields inherited from class org.opentrafficsim.road.gtu.lane.tactical.lmrs.AbstractLMRS

A_LAT, DCOOP, DFREE, DSYNC, DT

Constructor Summary

Constructors

Constructor and Description
LMRSsync(CarFollowingModel carFollowingModel) Constructor setting the car-following model.

Method Summary

Modifier and Type	Method and Description
org.opentrafficsim.core.gtu.plan.operational.OperationalPlan	generateOperationalPlan(org.opentrafficsim.core.gtu.GTU gtu, org.djunits.value.vdouble.scalar.Time startTime, DirectedPoint locationAtStartTime)
Set<MandatoryIncentive>	getDefaultMandatoryIncentives() Returns a set of default mandatory incentives.
Set<VoluntaryIncentive>	getDefaultVoluntaryIncentives() Returns a set of default voluntary incentives.
String	toString()

Methods inherited from class org.opentrafficsim.road.gtu.lane.tactical.lmrs.AbstractLMRS

addMandatoryIncentive, addVoluntaryIncentive, considerSpeedLimitTransitions, disableLaneChanges, exponentialHeadwayRelaxation, getMandatoryIncentives, getVoluntaryIncentives, limitDeceleration, minOf, setDefaultIncentives

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

buildLaneListForwardXXX, buildLanePathInfo, buildLanePathInfo, buildLanePathInfo, buildLinkListForward, connectsToPath, determineNextSplit, getCarFollowingModel, getReferenceLane, noLaneDrop, setCarFollowingModel

Methods inherited from class java.lang.Object

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

Constructor Detail

LMRSsync

public LMRSsync(CarFollowingModel carFollowingModel)

Constructor setting the car-following model.

Parameters:

carFollowingModel - Car-following model.

Method Detail

getDefaultMandatoryIncentives

public final Set<MandatoryIncentive> getDefaultMandatoryIncentives()

Returns a set of default mandatory incentives.

Specified by:

getDefaultMandatoryIncentives in class AbstractLMRS

Returns:

Set of default mandatory incentives.

getDefaultVoluntaryIncentives

public final Set<VoluntaryIncentive> getDefaultVoluntaryIncentives()

Returns a set of default voluntary incentives.

Specified by:

getDefaultVoluntaryIncentives in class AbstractLMRS

Returns:

Set of default voluntary incentives.

generateOperationalPlan

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

Throws:

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

org.opentrafficsim.core.gtu.GTUException

org.opentrafficsim.core.network.NetworkException

org.opentrafficsim.core.gtu.behavioralcharacteristics.ParameterException

toString

public final String toString()

Overrides:

toString in class Object