diff --git a/features/car/classes.feature b/features/car/classes.feature
index 6c2a5cf22b..108ee8cefe 100644
--- a/features/car/classes.feature
+++ b/features/car/classes.feature
@@ -82,6 +82,23 @@ Feature: Car - Mode flag
             | from | to | route | turns        | classes                                      |
             | a    | d  | ab,cd | depart,arrive| [(restricted),(motorway,restricted),()],[()] |
 
+    Scenario: Car - We tag access=unknown with a restricted class
+        Given the node map
+            """
+            a b
+              c d
+            """
+
+        And the ways
+            | nodes | highway | access   |
+            | ab    | primary | unknown  |
+            | bc    | motorway| unknown  |
+            | cd    | primary |          |
+
+        When I route I should get
+            | from | to | route | turns        | classes                                      |
+            | a    | d  | ab,cd | depart,arrive| [(restricted),(motorway,restricted),()],[()] |
+
     Scenario: Car - We tag toll with a class
         Given the node map
             """
diff --git a/profiles/car.lua b/profiles/car.lua
index e65b7c3afa..1702d934f2 100644
--- a/profiles/car.lua
+++ b/profiles/car.lua
@@ -86,8 +86,7 @@ function setup()
       'vehicle',
       'permissive',
       'designated',
-      'hov',
-      'unknown'
+      'hov'
     },
 
     access_tag_blacklist = Set {
@@ -125,6 +124,7 @@ function setup()
       'customers',
       'permit',
       'residents',
+      'unknown',
     },
 
     access_tags_hierarchy = Sequence {