diff --git a/train.rb b/train.rb
index bc6dbcb..b290290 100644
--- a/train.rb
+++ b/train.rb
@@ -1,15 +1,31 @@
 class Conductor
 
-	attr_reader :engineer
+	attr_reader :engineer, :message_board
 
-	def initialize(engineer)
-		@engineer = engineer
+	def initialize(engineer, message_board)
+    @engineer = engineer
+    @message_board = message_board
 	end
 
 	def see_danger_coming!
-		engineer.slow_down!
+		message_board.slow_down
 	end
 end
 
 class Engineer
-end
\ No newline at end of file
+
+  attr_reader :message_board
+
+  def initialize(message_board)
+    @message_board = message_board
+  end
+
+  def slow_down
+    message_board.confirm_slow_down
+  end
+end
+
+class MessageBoard
+  def confirm_slow_down
+  end
+end
diff --git a/train_spec.rb b/train_spec.rb
index de4cff5..eea898b 100644
--- a/train_spec.rb
+++ b/train_spec.rb
@@ -2,12 +2,24 @@
 require './train'
 describe Conductor do
 
-	let(:engineer) { Engineer.new }
-	let(:conductor) { Conductor.new(engineer)}
+	let(:engineer) { double }
+	let(:message_board) { double }
+	let(:conductor) { Conductor.new(engineer, message_board)}
 
-	it "should tell the engineer to slow down" do
-		engineer.should_receive(:slow_down!)
+	it "should tell the message board to slow down" do
+		message_board.should_receive(:slow_down)
 		conductor.see_danger_coming!
 	end
-	
-end
\ No newline at end of file
+end
+
+describe Engineer do
+
+	let(:message_board) { double }
+	let(:engineer) { Engineer.new(message_board) }
+
+
+	it "should tell the message board to confirm slow down" do
+		message_board.should_receive(:confirm_slow_down)
+		engineer.slow_down
+	end
+end