Index: trunk/src/atmsdriver/model/Highway.java
===================================================================
--- trunk/src/atmsdriver/model/Highway.java	(revision 343)
+++ trunk/src/atmsdriver/model/Highway.java	(revision 353)
@@ -16,5 +16,5 @@
  * @author jdalbey
  */
-final public class Highway
+final public class Highway implements Comparable<Highway>
 {
     /** The identifying number for this highway, e.g., 101 */
@@ -49,3 +49,11 @@
         return Integer.toString(this.routeNumber);
     }
+
+    @Override
+    public int compareTo(Highway other)
+    {
+        int otherRoute = ((Highway) other).routeNumber; 
+        //ascending order
+        return this.routeNumber - otherRoute;        
+    }
 }