Index: actionpack/test/controller/routing_test.rb
===================================================================
--- actionpack/test/controller/routing_test.rb	(revision 9250)
+++ actionpack/test/controller/routing_test.rb	(working copy)
@@ -25,7 +25,7 @@
     ActionController::Routing.use_controllers! ['controller']
     @set = ActionController::Routing::RouteSet.new
     @set.draw do |map|
-      map.connect ':controller/:action/:variable'
+      map.connect ':controller/:action/:variable/*additional'
     end
 
     safe, unsafe = %w(: @ & = + $ , ;), %w(^ / ? # [ ])
@@ -36,17 +36,19 @@
   end
 
   def test_route_generation_escapes_unsafe_path_characters
-    assert_equal "/contr#{@segment}oller/act#{@escaped}ion/var#{@escaped}iable",
+    assert_equal "/contr#{@segment}oller/act#{@escaped}ion/var#{@escaped}iable/add#{@escaped}itional-1/add#{@escaped}itional-2",
       @set.generate(:controller => "contr#{@segment}oller",
                     :action => "act#{@segment}ion",
-                    :variable => "var#{@segment}iable")
+                    :variable => "var#{@segment}iable",
+                    :additional => ["add#{@segment}itional-1", "add#{@segment}itional-2"])
   end
 
   def test_route_recognition_unescapes_path_components
     options = { :controller => "controller",
                 :action => "act#{@segment}ion",
-                :variable => "var#{@segment}iable" }
-    assert_equal options, @set.recognize_path("/controller/act#{@escaped}ion/var#{@escaped}iable")
+                :variable => "var#{@segment}iable",
+                :additional => ["add#{@segment}itional-1", "add#{@segment}itional-2"] }
+    assert_equal options, @set.recognize_path("/controller/act#{@escaped}ion/var#{@escaped}iable/add#{@escaped}itional-1/add#{@escaped}itional-2")
   end
 end
 
Index: actionpack/lib/action_controller/routing/segments.rb
===================================================================
--- actionpack/lib/action_controller/routing/segments.rb	(revision 9250)
+++ actionpack/lib/action_controller/routing/segments.rb	(working copy)
@@ -244,13 +244,14 @@
     end
 
     class PathSegment < DynamicSegment #:nodoc:
-      RESERVED_PCHAR = "#{Segment::RESERVED_PCHAR}/"
-      UNSAFE_PCHAR = Regexp.new("[^#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}]", false, 'N').freeze
-
       def interpolation_chunk(value_code = "#{local_name}")
-        "\#{URI.escape(#{value_code}.to_s, ActionController::Routing::PathSegment::UNSAFE_PCHAR)}"
+        "\#{#{value_code}}"
       end
 
+      def extract_value
+        "#{local_name} = hash[:#{key}] && hash[:#{key}].collect { |path_component| URI.escape(path_component, ActionController::Routing::Segment::UNSAFE_PCHAR) }.to_param #{"|| #{default.inspect}" if default}"
+      end
+
       def default
         ''
       end