org.opentrafficsim.road.gtu.lane.perception.headway

Class AbstractHeadwayGTU

java.lang.Object

org.opentrafficsim.road.gtu.lane.perception.headway.AbstractHeadway

org.opentrafficsim.road.gtu.lane.perception.headway.AbstractHeadwayCopy

org.opentrafficsim.road.gtu.lane.perception.headway.AbstractHeadwayGTU

All Implemented Interfaces:

Serializable, Comparable<Headway>, Identifiable, PerceivedObject, Headway, HeadwayGTU

Direct Known Subclasses:

HeadwayGTURealCopy, HeadwayGTUSimple, HeadwayGTUType

public abstract class AbstractHeadwayGTU
extends AbstractHeadwayCopy
implements HeadwayGTU

Container for a reference to information about a (lane based) GTU and a headway. The Headway can store information about GTUs or objects ahead of the reference GTU, behind the reference GTU, or (partially) parallel to the reference GTU. In addition to the (perceived) headway, several other pieces of information can be stored, such as (perceived) speed, (perceived) acceleration, (perceived) turn indicators, and (perceived) braking lights.
Special care must be taken in curves when perceiving headway of a GTU or object on an adjacent lane.The question is whether we perceive the parallel or ahead/behind based on a line perpendicular to the front/back of the GTU (rectangular), or perpendicular to the center line of the lane (wedge-shaped in case of a curve). The difficulty of a wedge-shaped situation is that reciprocity might be violated: in case of a clothoid, for instance, it is not sure that the point on the center line when projected from lane 1 to lane 2 is the same as the projection from lane 2 to lane 1. The same holds for shapes with sharp bends. Therefore, algorithms implementing headway should only project the reference point of the reference GTU on the center line of the adjacent lane, and then calculate the forward position and backward position on the adjacent lane based on the reference point. Still, our human perception of what is parallel and what not, is not reflected by fractional positions. See examples in http://simulation.tudelft.nl:8085/browse/OTS-113.

Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Version:

$Revision: 1368 $, $LastChangedDate: 2015-09-02 00:20:20 +0200 (Wed, 02 Sep 2015) $, by $Author: averbraeck $, initial version 11 feb. 2015

Author:

Alexander Verbraeck, Peter Knoppers

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.opentrafficsim.road.gtu.lane.perception.headway.Headway

Headway.ObjectType

Constructor Summary

Constructors

Constructor and Description
AbstractHeadwayGTU(String id, GTUType gtuType, Length distance, boolean facingSameDirection, Length length, Length width, Speed speed, Acceleration acceleration, Speed desiredSpeed, GTUStatus... gtuStatus) Construct a new Headway information object, for a moving GTU ahead of us or behind us.
AbstractHeadwayGTU(String id, GTUType gtuType, Length distance, boolean facingSameDirection, Length length, Length width, Speed desiredSpeed, GTUStatus... gtuStatus) Construct a new Headway information object, for a non-moving GTU ahead of us or behind us.
AbstractHeadwayGTU(String id, GTUType gtuType, Length overlapFront, Length overlap, Length overlapRear, boolean facingSameDirection, Length length, Length width, Speed speed, Acceleration acceleration, Speed desiredSpeed, GTUStatus... gtuStatus) Construct a new Headway information object, for a moving GTU parallel with us.
AbstractHeadwayGTU(String id, GTUType gtuType, Length overlapFront, Length overlap, Length overlapRear, boolean facingSameDirection, Length length, Length width, Speed desiredSpeed, GTUStatus... gtuStatus) Construct a new Headway information object, for a non-moving GTU parallel with us.

Method Summary

Modifier and Type	Method and Description
Speed	getDesiredSpeed() Returns the perceived desired speed of the neighbor.
protected GTUStatus[]	getGtuStatus() For subclasses that create a copy of themselves.
static GTUStatus[]	getGTUStatuses(LaneBasedGTU gtu, Time when) Collects GTU statuses from a gtu.
GTUType	getGtuType()
static SpeedLimitInfo	getSpeedLimitInfo(LaneBasedGTU gtu) Creates speed limit info for given GTU.
Length	getWidth() Returns the width of the GTU.
boolean	isBrakingLightsOn()
boolean	isEmergencyLightsOn()
boolean	isFacingSameDirection()
boolean	isHonking()
boolean	isLeftTurnIndicatorOn()
boolean	isRightTurnIndicatorOn()
String	toString()

Methods inherited from class org.opentrafficsim.road.gtu.lane.perception.headway.AbstractHeadwayCopy

equals, getAcceleration, getId, getLength, getObjectType, getSpeed, hashCode

Methods inherited from class org.opentrafficsim.road.gtu.lane.perception.headway.AbstractHeadway

getDistance, getOverlap, getOverlapFront, getOverlapRear, isAhead, isBehind, isParallel

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.opentrafficsim.road.gtu.lane.perception.headway.HeadwayGTU

getCarFollowingModel, getParameters, getRoute, getSpeedLimitInfo, moved

Methods inherited from interface org.opentrafficsim.road.gtu.lane.perception.headway.Headway

compareTo, getAcceleration, getDistance, getId, getLength, getObjectType, getOverlap, getOverlapFront, getOverlapRear, getSpeed, isAhead, isBehind, isParallel

Constructor Detail

AbstractHeadwayGTU

public AbstractHeadwayGTU(String id,
                          GTUType gtuType,
                          Length distance,
                          boolean facingSameDirection,
                          Length length,
                          Length width,
                          Speed speed,
                          Acceleration acceleration,
                          Speed desiredSpeed,
                          GTUStatus... gtuStatus)
                   throws GTUException

Construct a new Headway information object, for a moving GTU ahead of us or behind us.

Parameters:

id - String; the id of the GTU for comparison purposes, can not be null.

gtuType - GTUType; the perceived GTU Type, or null if unknown.

distance - the distance to the other object; if this constructor is used, distance cannot be null.

facingSameDirection - boolean; whether the GTU is facing the same direction.

length - the (perceived) length of the other object; can not be null.

width - the (perceived) width of the other object; can not be null.

speed - the (perceived) speed of the other object; can be null if unknown.

acceleration - the (perceived) acceleration of the other object; can be null if unknown.

desiredSpeed - Speed; desired speed

gtuStatus - GTUStatus...; the observable characteristics of the GTU.

Throws:

GTUException - when id is null, objectType is null, or parameters are inconsistent

AbstractHeadwayGTU

public AbstractHeadwayGTU(String id,
                          GTUType gtuType,
                          Length distance,
                          boolean facingSameDirection,
                          Length length,
                          Length width,
                          Speed desiredSpeed,
                          GTUStatus... gtuStatus)
                   throws GTUException

Construct a new Headway information object, for a non-moving GTU ahead of us or behind us.

Parameters:

id - String; the id of the GTU for comparison purposes, can not be null.

gtuType - GTUType; the perceived GTU Type, or null if unknown.

distance - Length; the distance to the other GTU; if this constructor is used, distance cannot be null.

facingSameDirection - boolean; whether the GTU is facing the same direction.

length - the (perceived) length of the other object; can not be null.

width - the (perceived) width of the other object; can not be null.

desiredSpeed - Speed; desired speed

gtuStatus - GTUStatus...; the observable characteristics of the GTU.

Throws:

GTUException - when id is null, or parameters are inconsistent

AbstractHeadwayGTU

public AbstractHeadwayGTU(String id,
                          GTUType gtuType,
                          Length overlapFront,
                          Length overlap,
                          Length overlapRear,
                          boolean facingSameDirection,
                          Length length,
                          Length width,
                          Speed speed,
                          Acceleration acceleration,
                          Speed desiredSpeed,
                          GTUStatus... gtuStatus)
                   throws GTUException

Construct a new Headway information object, for a moving GTU parallel with us.

Parameters:

id - String; the id of the GTU for comparison purposes, can not be null.

gtuType - GTUType; the perceived GTU Type, or null if unknown.

overlapFront - the front-front distance to the other GTU; if this constructor is used, this value cannot be null.

overlap - the 'center' overlap with the other GTU; if this constructor is used, this value cannot be null.

overlapRear - the rear-rear distance to the other GTU; if this constructor is used, this value cannot be null.

facingSameDirection - boolean; whether the GTU is facing the same direction.

length - the (perceived) length of the other object; can not be null.

width - the (perceived) width of the other object; can not be null.

speed - the (perceived) speed of the other GTU; can be null if unknown.

acceleration - the (perceived) acceleration of the other GTU; can be null if unknown.

desiredSpeed - Speed; desired speed

gtuStatus - GTUStatus...; the observable characteristics of the GTU.

Throws:

GTUException - when id is null, or parameters are inconsistent

AbstractHeadwayGTU

public AbstractHeadwayGTU(String id,
                          GTUType gtuType,
                          Length overlapFront,
                          Length overlap,
                          Length overlapRear,
                          boolean facingSameDirection,
                          Length length,
                          Length width,
                          Speed desiredSpeed,
                          GTUStatus... gtuStatus)
                   throws GTUException

Construct a new Headway information object, for a non-moving GTU parallel with us.

Parameters:

id - String; the id of the GTU for comparison purposes, can not be null.

gtuType - GTUType; the perceived GTU Type, or null if unknown.

overlapFront - the front-front distance to the other GTU; if this constructor is used, this value cannot be null.

overlap - the 'center' overlap with the other GTU; if this constructor is used, this value cannot be null.

overlapRear - the rear-rear distance to the other GTU; if this constructor is used, this value cannot be null.

facingSameDirection - boolean; whether the GTU is facing the same direction.

length - the (perceived) length of the other object; can not be null.

width - the (perceived) width of the other object; can not be null.

desiredSpeed - Speed; desired speed

gtuStatus - GTUStatus...; the observable characteristics of the GTU.

Throws:

GTUException - when id is null, or parameters are inconsistent

Method Detail

getGtuType

public final GTUType getGtuType()

Specified by:

getGtuType in interface HeadwayGTU

Returns:

gtuType

getDesiredSpeed

public final Speed getDesiredSpeed()

Returns the perceived desired speed of the neighbor.

Specified by:

getDesiredSpeed in interface HeadwayGTU

Returns:

Speed; perceived desired speed of the neighbor

isFacingSameDirection

public final boolean isFacingSameDirection()

Specified by:

isFacingSameDirection in interface HeadwayGTU

Returns:

facingSameDirection

isBrakingLightsOn

public final boolean isBrakingLightsOn()

Specified by:

isBrakingLightsOn in interface HeadwayGTU

Returns:

were the braking lights on?

isLeftTurnIndicatorOn

public final boolean isLeftTurnIndicatorOn()

Specified by:

isLeftTurnIndicatorOn in interface HeadwayGTU

Returns:

was the left turn indicator on?

isRightTurnIndicatorOn

public final boolean isRightTurnIndicatorOn()

Specified by:

isRightTurnIndicatorOn in interface HeadwayGTU

Returns:

was the right turn indicator on?

isEmergencyLightsOn

public final boolean isEmergencyLightsOn()

Specified by:

isEmergencyLightsOn in interface HeadwayGTU

Returns:

were the emergency lights on?

isHonking

public final boolean isHonking()

Specified by:

isHonking in interface HeadwayGTU

Returns:

was the vehicle honking or ringing its bell when being observed for the headway?

getGtuStatus

protected final GTUStatus[] getGtuStatus()

For subclasses that create a copy of themselves.

Returns:

set of gtu status

getGTUStatuses

public static final GTUStatus[] getGTUStatuses(LaneBasedGTU gtu,
                                               Time when)

Collects GTU statuses from a gtu.

Parameters:

gtu - LaneBasedGTU; gtu

when - Time; time

Returns:

GTU statuses

getSpeedLimitInfo

public static SpeedLimitInfo getSpeedLimitInfo(LaneBasedGTU gtu)

Creates speed limit info for given GTU.

Parameters:

gtu - LaneBasedGTU; gtu to the the speed limit info for

Returns:

speed limit info for given GTU

getWidth

public Length getWidth()

Returns the width of the GTU.

Specified by:

getWidth in interface HeadwayGTU

Returns:

Length; width of the GTU

toString

public String toString()

Overrides:

toString in class AbstractHeadway