diff --git a/OSMDatastructure/Tag.cs b/OSMDatastructure/Tag.cs
index 22cc6b1..cdc8bd4 100644
--- a/OSMDatastructure/Tag.cs
+++ b/OSMDatastructure/Tag.cs
@@ -98,20 +98,20 @@ public class Tag
 
     public static readonly Dictionary<WayType, byte> defaultSpeedCar = new() {
         { WayType.NONE, 0 },
-        { WayType.motorway, 130 },
+        { WayType.motorway, 100 },
         { WayType.motorroad, 90 },
         { WayType.trunk, 85 },
-        { WayType.primary, 80 },
-        { WayType.secondary, 80 },
-        { WayType.tertiary, 70 },
+        { WayType.primary, 65 },
+        { WayType.secondary, 60 },
+        { WayType.tertiary, 50 },
         { WayType.unclassified, 15 },
         { WayType.residential, 10 },
         { WayType.motorway_link, 60 },
         { WayType.trunk_link, 50 },
         { WayType.primary_link, 50 },
         { WayType.secondary_link, 50 },
-        { WayType.tertiary_link, 50 },
-        { WayType.living_street, 5 },
+        { WayType.tertiary_link, 30 },
+        { WayType.living_street, 10 },
         { WayType.service, 1 },
         { WayType.pedestrian, 0 },
         { WayType.track, 15 },