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.perception.LanePerception;
6 import org.opentrafficsim.road.gtu.lane.tactical.following.DualAccelerationStep;
7
8 /**
9 * The altruistic driver changes lane when that is beneficial for all drivers.
10 * <p>
11 * Copyright (c) 2013-2018 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
12 * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
13 * <p>
14 * @version $Revision: 1378 $, $LastChangedDate: 2015-09-03 13:38:01 +0200 (Thu, 03 Sep 2015) $, by $Author: averbraeck $,
15 * initial version 5 nov. 2014 <br>
16 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
17 */
18 public class DirectedAltruistic extends AbstractDirectedLaneChangeModel
19 {
20 /**
21 * @param perception the perception to use
22 */
23 public DirectedAltruistic(final LanePerception perception)
24 {
25 super(perception);
26 }
27
28 /** {@inheritDoc} */
29 @Override
30 public final Acceleration applyDriverPersonality(final DualAccelerationStep accelerationSteps)
31 {
32 // The unit of the result is the acceleration unit of the leader acceleration.
33 // Discussion. The altruistic driver personality in Treiber adds two accelerations together. This reduces the
34 // "sensitivity" for keep lane, keep right and follow route incentives.
35 // This implementation returns the average of the two in order to avoid this sensitivity problem.
36 AccelerationUnit unit = accelerationSteps.getLeaderAcceleration().getUnit();
37 return new Acceleration((accelerationSteps.getLeaderAcceleration().getInUnit()
38 + accelerationSteps.getFollowerAcceleration().getInUnit(unit)) / 2, unit);
39 }
40
41 /** {@inheritDoc} */
42 @Override
43 public final String getName()
44 {
45 return "Altruistic";
46 }
47
48 /** {@inheritDoc} */
49 @Override
50 public final String getLongName()
51 {
52 return "Altruistic lane change model (as described by Treiber).";
53 }
54
55 /** {@inheritDoc} */
56 @Override
57 public final String toString()
58 {
59 return "DirectedAltruistic [name=" + getName() + "]";
60 }
61
62 }