java.lang.Object
- org.opentrafficsim.road.gtu.lane.tactical.util.lmrs.LmrsUtil

All Implemented Interfaces:

LmrsParameters
```
public final class LmrsUtil
extends Object
implements LmrsParameters
```
Copyright (c) 2013-2022 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 Jul 26, 2016

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Field Summary

Fields
Modifier and Type	Field	Description
`static org.opentrafficsim.base.parameters.ParameterTypeAcceleration`	`BCRIT`	Maximum critical deceleration, e.g.
`static org.opentrafficsim.base.parameters.ParameterTypeDuration`	`DT`	Fixed model time step.
`static org.opentrafficsim.base.parameters.ParameterTypeDuration`	`T`	Current car-following headway.
`static org.opentrafficsim.base.parameters.ParameterTypeDuration`	`TAU`	Headway relaxation time.
`static org.opentrafficsim.base.parameters.ParameterTypeDuration`	`TMAX`	Maximum car-following headway.
`static org.opentrafficsim.base.parameters.ParameterTypeDuration`	`TMIN`	Minimum car-following headway.

Fields inherited from interface org.opentrafficsim.road.gtu.lane.tactical.util.lmrs.LmrsParameters
COURTESY, DCOOP, DFREE, DLC, DLEFT, DRIGHT, DSYNC, SOCIO, VGAIN

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) static boolean`	`acceptLaneChange(LanePerception perception, org.opentrafficsim.base.parameters.Parameters params, SpeedLimitInfo sli, CarFollowingModel cfm, double desire, Speed ownSpeed, Acceleration ownAcceleration, LateralDirectionality lat, GapAcceptance gapAcceptance, LaneChange laneChange)`	Determine whether a lane change is acceptable (gap, lane markings, etc.).
`static SimpleOperationalPlan`	`determinePlan(LaneBasedGTU gtu, Time startTime, CarFollowingModel carFollowingModel, LaneChange laneChange, LmrsData lmrsData, LanePerception perception, Iterable<MandatoryIncentive> mandatoryIncentives, Iterable<VoluntaryIncentive> voluntaryIncentives)`	Determines a simple representation of an operational plan.
`static Desire`	`getLaneChangeDesire(org.opentrafficsim.base.parameters.Parameters parameters, LanePerception perception, CarFollowingModel carFollowingModel, Iterable<MandatoryIncentive> mandatoryIncentives, Iterable<VoluntaryIncentive> voluntaryIncentives, Map<Class<? extends Incentive>,Desire> desireMap)`	Determines lane change desire for the given GtU.
`(package private) static void`	`resetDesiredHeadway(org.opentrafficsim.base.parameters.Parameters params)`	Resets value for T depending on level of lane change desire.
`(package private) static void`	`setDesiredHeadway(org.opentrafficsim.base.parameters.Parameters params, double desire)`	Sets value for T depending on level of lane change desire.
`static Acceleration`	`singleAcceleration(Length distance, Speed followerSpeed, Speed leaderSpeed, double desire, org.opentrafficsim.base.parameters.Parameters params, SpeedLimitInfo sli, CarFollowingModel cfm)`	Determine acceleration from car-following with desire-adjusted headway.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DT

public static final org.opentrafficsim.base.parameters.ParameterTypeDuration DT

Fixed model time step.

TMIN

public static final org.opentrafficsim.base.parameters.ParameterTypeDuration TMIN

Minimum car-following headway.

T

public static final org.opentrafficsim.base.parameters.ParameterTypeDuration T

Current car-following headway.

TMAX

public static final org.opentrafficsim.base.parameters.ParameterTypeDuration TMAX

Maximum car-following headway.

TAU

public static final org.opentrafficsim.base.parameters.ParameterTypeDuration TAU

Headway relaxation time.

BCRIT

public static final org.opentrafficsim.base.parameters.ParameterTypeAcceleration BCRIT

Maximum critical deceleration, e.g. stop/go at traffic light.

Method Detail

determinePlan

public static SimpleOperationalPlan determinePlan(LaneBasedGTU gtu,
                                                  Time startTime,
                                                  CarFollowingModel carFollowingModel,
                                                  LaneChange laneChange,
                                                  LmrsData lmrsData,
                                                  LanePerception perception,
                                                  Iterable<MandatoryIncentive> mandatoryIncentives,
                                                  Iterable<VoluntaryIncentive> voluntaryIncentives)
                                           throws GTUException,
                                                  NetworkException,
                                                  org.opentrafficsim.base.parameters.ParameterException,
                                                  OperationalPlanException

Determines a simple representation of an operational plan.

Parameters:: gtu - LaneBasedGTU; gtu; startTime - Time; start time; carFollowingModel - CarFollowingModel; car-following model; laneChange - LaneChange; lane change status; lmrsData - LmrsData; LMRS data; perception - LanePerception; perception; mandatoryIncentives - Iterable<MandatoryIncentive>; set of mandatory lane change incentives; voluntaryIncentives - Iterable<VoluntaryIncentive>; set of voluntary lane change incentives
Returns:: simple operational plan
Throws:: GTUException - gtu exception; NetworkException - network exception; org.opentrafficsim.base.parameters.ParameterException - parameter exception; OperationalPlanException - operational plan exception

getLaneChangeDesire
```
public static Desire getLaneChangeDesire(org.opentrafficsim.base.parameters.Parameters parameters,
                                         LanePerception perception,
                                         CarFollowingModel carFollowingModel,
                                         Iterable<MandatoryIncentive> mandatoryIncentives,
                                         Iterable<VoluntaryIncentive> voluntaryIncentives,
                                         Map<Class<? extends Incentive>,Desire> desireMap)
                                  throws org.opentrafficsim.base.parameters.ParameterException,
                                         GTUException,
                                         OperationalPlanException
```
Determines lane change desire for the given GtU. Mandatory desire is deduced as the maximum of a set of mandatory incentives, while voluntary desires are added. Depending on the level of mandatory lane change desire, voluntary desire may be included partially. If both are positive or negative, voluntary desire is fully included. Otherwise, voluntary desire is less considered within the range dSync < |mandatory| < dCoop. The absolute value is used as large negative mandatory desire may also dominate voluntary desire.

Parameters:

parameters - Parameters; parameters

perception - LanePerception; perception

carFollowingModel - CarFollowingModel; car-following model

mandatoryIncentives - Iterable<MandatoryIncentive>; mandatory incentives

voluntaryIncentives - Iterable<VoluntaryIncentive>; voluntary incentives

desireMap - Map<Class<? extends Incentive>,Desire>; map where calculated desires are stored in

Returns:

lane change desire for gtu

Throws:

org.opentrafficsim.base.parameters.ParameterException - if a parameter is not defined

GTUException - if there is no mandatory incentive, the model requires at least one

OperationalPlanException - perception exception

acceptLaneChange

static boolean acceptLaneChange(LanePerception perception,
                                org.opentrafficsim.base.parameters.Parameters params,
                                SpeedLimitInfo sli,
                                CarFollowingModel cfm,
                                double desire,
                                Speed ownSpeed,
                                Acceleration ownAcceleration,
                                LateralDirectionality lat,
                                GapAcceptance gapAcceptance,
                                LaneChange laneChange)
                         throws org.opentrafficsim.base.parameters.ParameterException,
                                OperationalPlanException

Determine whether a lane change is acceptable (gap, lane markings, etc.).

Parameters:: perception - LanePerception; perception; params - Parameters; parameters; sli - SpeedLimitInfo; speed limit info; cfm - CarFollowingModel; car-following model; desire - double; level of lane change desire; ownSpeed - Speed; own speed; ownAcceleration - Acceleration; current car-following acceleration; lat - LateralDirectionality; lateral direction for synchronization; gapAcceptance - GapAcceptance; gap-acceptance model; laneChange - LaneChange; lane change
Returns:: whether a gap is acceptable
Throws:: org.opentrafficsim.base.parameters.ParameterException - if a parameter is not defined; OperationalPlanException - perception exception

setDesiredHeadway
```
static void setDesiredHeadway(org.opentrafficsim.base.parameters.Parameters params,
                              double desire)
                       throws org.opentrafficsim.base.parameters.ParameterException
```
Sets value for T depending on level of lane change desire.

Parameters:

params - Parameters; parameters

desire - double; lane change desire

Throws:

org.opentrafficsim.base.parameters.ParameterException - if T, TMIN or TMAX is not in the parameters

resetDesiredHeadway
```
static void resetDesiredHeadway(org.opentrafficsim.base.parameters.Parameters params)
                         throws org.opentrafficsim.base.parameters.ParameterException
```
Resets value for T depending on level of lane change desire.

Parameters:

params - Parameters; parameters

Throws:

org.opentrafficsim.base.parameters.ParameterException - if T is not in the parameters

singleAcceleration

public static Acceleration singleAcceleration(Length distance,
                                              Speed followerSpeed,
                                              Speed leaderSpeed,
                                              double desire,
                                              org.opentrafficsim.base.parameters.Parameters params,
                                              SpeedLimitInfo sli,
                                              CarFollowingModel cfm)
                                       throws org.opentrafficsim.base.parameters.ParameterException

Determine acceleration from car-following with desire-adjusted headway.

Parameters:: distance - Length; distance from follower to leader; followerSpeed - Speed; speed of follower; leaderSpeed - Speed; speed of leader; desire - double; level of lane change desire; params - Parameters; parameters; sli - SpeedLimitInfo; speed limit info; cfm - CarFollowingModel; car-following model
Returns:: acceleration from car-following
Throws:: org.opentrafficsim.base.parameters.ParameterException - if a parameter is not defined

Class LmrsUtil

Field Summary

Fields inherited from interface org.opentrafficsim.road.gtu.lane.tactical.util.lmrs.LmrsParameters

Method Summary

Methods inherited from class java.lang.Object