diff --git a/preferences.xml b/preferences.xml
index 38c5067a6..663eb8ab1 100644
--- a/preferences.xml
+++ b/preferences.xml
@@ -263,7 +263,7 @@ Started September 2000 by David Megginson, david@megginson.com
 
   <ai-traffic>
    <enabled type="bool">true</enabled>
-   <level type="int">2</level>
+   <level type="int">1</level>
   </ai-traffic>
 
   <ai>