1 package org.opentrafficsim.road.gtu.lane.tactical.directedlanechange;
2
3 import org.djunits.unit.AccelerationUnit;
4 import org.djunits.value.vdouble.scalar.Acceleration;
5 import org.opentrafficsim.road.gtu.lane.tactical.following.DualAccelerationStep;
6
7 /**
8 * The altruistic driver changes lane when that is beneficial for all drivers.
9 * <p>
10 * Copyright (c) 2013-2015 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
11 * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
12 * <p>
13 * @version $Revision: 1378 $, $LastChangedDate: 2015-09-03 13:38:01 +0200 (Thu, 03 Sep 2015) $, by $Author: averbraeck $,
14 * initial version 5 nov. 2014 <br>
15 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
16 */
17 public class DirectedAltruistic extends AbstractDirectedLaneChangeModel
18 {
19
20 /** {@inheritDoc} */
21 @Override
22 public final Acceleration applyDriverPersonality(final DualAccelerationStep accelerationSteps)
23 {
24 // The unit of the result is the acceleration unit of the leader acceleration.
25 // Discussion. The altruistic driver personality in Treiber adds two accelerations together. This reduces the
26 // "sensitivity" for keep lane, keep right and follow route incentives.
27 // This implementation returns the average of the two in order to avoid this sensitivity problem.
28 AccelerationUnit unit = accelerationSteps.getLeaderAcceleration().getUnit();
29 return new Acceleration((accelerationSteps.getLeaderAcceleration().getInUnit() + accelerationSteps
30 .getFollowerAcceleration().getInUnit(unit)) / 2, unit);
31 }
32
33 /** {@inheritDoc} */
34 @Override
35 public final String getName()
36 {
37 return "Altruistic";
38 }
39
40 /** {@inheritDoc} */
41 @Override
42 public final String getLongName()
43 {
44 return "Altruistic lane change model (as described by Treiber).";
45 }
46
47 }