1 package org.opentrafficsim.road.network.lane.object.trafficlight;
2
3 /**
4 * The colors for a normal traffic light.
5 * <p>
6 * Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
7 * BSD-style license. See <a href="http://opentrafficsim.org/docs/current/license.html">OpenTrafficSim License</a>.
8 * </p>
9 * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
10 * initial version Oct 6, 2016 <br>
11 * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
12 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
13 * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
14 */
15 public enum TrafficLightColor
16 {
17 /** GTU needs to stop. */
18 RED,
19
20 /** GTU is allowed to continue if it cannot stop anymore. */
21 YELLOW,
22
23 /** GTU is allowed to drive. */
24 GREEN,
25
26 /** Pre-green indication. */
27 PREGREEN,
28
29 /** Traffic light is not working. */
30 BLACK;
31
32 /** @return whether the light is red or yellow. */
33 public final boolean isRedOrYellow()
34 {
35 return this.equals(RED) | this.equals(YELLOW);
36 }
37
38 /** @return whether the light is red. */
39 public final boolean isRed()
40 {
41 return this.equals(RED);
42 }
43
44 /** @return whether the light is yellow. */
45 public final boolean isYellow()
46 {
47 return this.equals(YELLOW);
48 }
49
50 /** @return whether the light is green. */
51 public final boolean isGreen()
52 {
53 return this.equals(GREEN);
54 }
55
56 /** @return whether the light is pre-green. */
57 public final boolean isPreGreen()
58 {
59 return this.equals(PREGREEN);
60 }
61
62 /** @return whether the light is black (off). */
63 public final boolean isBlack()
64 {
65 return this.equals(BLACK);
66 }
67
68 }