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

Class SpeedLimitUtil

java.lang.Object

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

public final class SpeedLimitUtil
extends Object

Static methods regarding speed limits for composition in tactical planners.

Copyright (c) 2013-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Field Summary

Fields

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

Method Summary

Modifier and Type	Method	Description
static org.djunits.value.vdouble.scalar.Acceleration	considerSpeedLimitTransitions(TacticalContextEgo context, RelativeLane lane)	Acceleration for speed limit transitions.
static org.djunits.value.vdouble.scalar.Speed	getDesiredSpeedProxy(SpeedLimits speedLimits, org.djunits.value.vdouble.scalar.Speed maxVehicleSpeed)	Returns desired speed proxy as the minimum of maximum vehicle speed and present speed limits.
static org.djunits.value.vdouble.scalar.Speed	getSpeedForLateralAcceleration(org.djunits.value.vdouble.scalar.Length radius, org.djunits.value.vdouble.scalar.Acceleration acceleration)	Returns the speed for which the given lateral acceleration follows in the curve.

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

getSpeedForLateralAcceleration

public static org.djunits.value.vdouble.scalar.Speed getSpeedForLateralAcceleration(org.djunits.value.vdouble.scalar.Length radius,
 org.djunits.value.vdouble.scalar.Acceleration acceleration)

Returns the speed for which the given lateral acceleration follows in the curve.

Parameters:

radius - curve radius

acceleration - acceleration to result from speed in curve

Returns:

speed for which the given lateral acceleration follows in the curve

Throws:

IllegalArgumentException - if radius or acceleration is negative or zero

considerSpeedLimitTransitions

public static org.djunits.value.vdouble.scalar.Acceleration considerSpeedLimitTransitions(TacticalContextEgo context,
 RelativeLane lane)
                                                                                   throws ParameterException,
OperationalPlanException

Acceleration for speed limit transitions. This implementation decelerates before curves and speed bumps. For this it uses approachTargetSpeed() of the car-following utility. 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:

context - tactical information such as parameters and car-following model

lane - lane to consider

Returns:

acceleration for speed limit transitions

Throws:

ParameterException - if a required parameter is not found

OperationalPlanException - if there is no infrastructure perception

getDesiredSpeedProxy

public static org.djunits.value.vdouble.scalar.Speed getDesiredSpeedProxy(SpeedLimits speedLimits,
 org.djunits.value.vdouble.scalar.Speed maxVehicleSpeed)

Returns desired speed proxy as the minimum of maximum vehicle speed and present speed limits.

Parameters:

speedLimits - speed limits

maxVehicleSpeed - maximum vehicle speed

Returns:

desired speed proxy