diff --git a/preferences.xml b/preferences.xml
index b0d7d49fa..eb4cd2e50 100644
--- a/preferences.xml
+++ b/preferences.xml
@@ -531,12 +531,12 @@ Started September 2000 by David Megginson, david@megginson.com
   </atc>
 
   <ai-traffic>
-   <enabled type="bool" userarchive="y">false</enabled>
+   <enabled type="bool" userarchive="y">true</enabled>
    <level type="int" userarchive="y">1</level>
   </ai-traffic>
 
   <traffic-manager>
-     <enabled type="bool">false</enabled>
+     <enabled type="bool">true</enabled>
      <instantaneous-action type="bool">false</instantaneous-action>
      <use-custom-scenery-data type="bool">false</use-custom-scenery-data>
      <proportion>1.0</proportion>