AdaptationSpeed.java

package org.opentrafficsim.road.gtu.perception.mental;

import static org.opentrafficsim.base.parameters.constraint.NumericConstraint.POSITIVEZERO;

import org.opentrafficsim.base.parameters.ParameterException;
import org.opentrafficsim.base.parameters.ParameterTypeDouble;
import org.opentrafficsim.base.parameters.ParameterTypes;
import org.opentrafficsim.base.parameters.Parameters;
import org.opentrafficsim.road.gtu.perception.mental.channel.AdaptationSpeedChannel;

/**
 * Behavioral adaptation which reduces the desired speed to reduce task-demand. This implementation applies a linear reduction
 * based on task saturation. To use multiplicative adaptation by a standard factor see {@link AdaptationSpeedChannel}.
 * <p>
 * Copyright (c) 2013-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
 * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
 * </p>
 * @author Alexander Verbraeck
 * @author Peter Knoppers
 * @author Wouter Schakel
 */
public class AdaptationSpeed implements BehavioralAdaptation
{

    /** Parameter for desired speed scaling. */
    public static final ParameterTypeDouble BETA_V0 =
            new ParameterTypeDouble("beta_v0", "Maximum adaptation desired speed scaling", 1.0, POSITIVEZERO);

    /** Base value for the desired speed. */
    private Double fSpeed0;

    /** Base value for the desired speed relative to GTU type speed limit. */
    private Double fSpeedGtu0;

    /**
     * Constructor.
     */
    public AdaptationSpeed()
    {
        //
    }

    @Override
    public void adapt(final Parameters parameters) throws ParameterException
    {
        if (this.fSpeed0 == null)
        {
            this.fSpeed0 = parameters.getParameter(ParameterTypes.FSPEED);
            this.fSpeedGtu0 = parameters.getParameter(ParameterTypes.FSPEED_GTU);
        }
        double tsCrit = parameters.getOptionalParameter(SumFuller.TS_CRIT).orElse(1.0);
        double eps = parameters.getParameter(Fuller.TS) - tsCrit;
        eps = eps < 0.0 ? 0.0 : (eps >= 0.999 ? 0.999 : eps);
        double factor = 1.0 - parameters.getParameter(BETA_V0) * eps;
        parameters.setClaimedParameter(ParameterTypes.FSPEED, this.fSpeed0 * factor, this);
        parameters.setClaimedParameter(ParameterTypes.FSPEED_GTU, this.fSpeedGtu0 * factor, this);
    }

}