add expressway as valid speed source

git-svn-id: https://josm.openstreetmap.de/svn/trunk@19401 0c6e7542-c601-0410-84e7-c038aed88b3b

Author: stoecker

src/org/openstreetmap/josm/data/validation/tests/Highways.java

@@ -60,7 +60,7 @@ public class Highways extends Test {
 
     private static final Set<String> KNOWN_SOURCE_MAXSPEED_CONTEXTS = new HashSet<>(Arrays.asList(
             "urban", "rural", "zone", "zone10", "zone:10", "zone20", "zone:20", "zone30", "zone:30", "zone40", "zone:40", "zone60", "zone:60",
-            "nsl_single", "nsl_dual", "motorway", "trunk", "living_street", "bicycle_road"));
+            "nsl_single", "nsl_dual", "motorway", "trunk", "living_street", "bicycle_road", "expressway"));
 
     private static final Set<String> ISO_COUNTRIES = new HashSet<>(Arrays.asList(Locale.getISOCountries()));