Package org.opentrafficsim.road.gtu.lane.tactical.util

Class SpeedLimitUtil

java.lang.Object

org.opentrafficsim.road.gtu.lane.tactical.util.SpeedLimitUtil

public final class SpeedLimitUtil
extends java.lang.Object

Static methods regarding speed limits for composition in tactical planners.

Copyright (c) 2013-2020 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 May 20, 2016

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Field Summary

Fields

Modifier and Type	Field	Description
static ParameterTypeAcceleration	A_LAT	Maximum comfortable acceleration in the lateral direction.

Method Summary

Modifier and Type	Method	Description
static Acceleration	considerSpeedLimitTransitions(Parameters parameters, Speed speed, SpeedLimitProspect speedLimitProspect, CarFollowingModel carFollowingModel)	Acceleration for speed limit transitions.
static Speed	getLegalSpeedLimit(SpeedLimitInfo speedLimitInfo)	Returns the minimum speed of the applicable speed limit types MAX_LEGAL_VEHICLE_SPEED, ROAD_CLASS, FIXED_SIGN and DYNAMIC_SIGN.
static Speed	getMaximumVehicleSpeed(SpeedLimitInfo speedLimitInfo)	Returns the speed of speed limit type MAX_VEHICLE_SPEED.

Methods inherited from class java.lang.Object

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

Field Details

A_LAT

public static final ParameterTypeAcceleration A_LAT

Maximum comfortable acceleration in the lateral direction.

Method Details

getLegalSpeedLimit

public static Speed getLegalSpeedLimit(SpeedLimitInfo speedLimitInfo)

Returns the minimum speed of the applicable speed limit types MAX_LEGAL_VEHICLE_SPEED, ROAD_CLASS, FIXED_SIGN and DYNAMIC_SIGN. ROAD_CLASS is only used if FIXED_SIGN and DYNAMIC_SIGN are not present. This method may be overridden by subclasses to implement additional behavior regarding legal speed limits.

Parameters:

speedLimitInfo - SpeedLimitInfo; speed limit info

Returns:

minimum of speed of speed limit types

Throws:

java.lang.NullPointerException - if speed limit info is null

getMaximumVehicleSpeed

public static Speed getMaximumVehicleSpeed(SpeedLimitInfo speedLimitInfo)

Returns the speed of speed limit type MAX_VEHICLE_SPEED. This method may be overridden by subclasses to implement additional behavior regarding maximum vehicle speed limits.

Parameters:

speedLimitInfo - SpeedLimitInfo; speed limit info

Returns:

speed of speed limit type MAX_VEHICLE_SPEED

Throws:

java.lang.NullPointerException - if speed limit info is null

considerSpeedLimitTransitions

public static Acceleration considerSpeedLimitTransitions(Parameters parameters, Speed speed, SpeedLimitProspect speedLimitProspect, CarFollowingModel carFollowingModel) throws ParameterException

Acceleration for speed limit transitions. This implementation decelerates before curves and speed bumps. For this it uses approachTargetSpeed() of the abstract car-following model implementation. All remaining transitions happen in the default manner, i.e. deceleration and acceleration after the speed limit change and governed by the car-following model.

Parameters:

parameters - Parameters; parameters

speed - Speed; current speed

speedLimitProspect - SpeedLimitProspect; speed limit prospect

carFollowingModel - CarFollowingModel; car following model

Returns:

acceleration for speed limit transitions

Throws:

ParameterException - if a required parameter is not found