diff --git a/frontend/src/Main.elm b/frontend/src/Main.elm
index 0044b7f..5439295 100644
--- a/frontend/src/Main.elm
+++ b/frontend/src/Main.elm
@@ -7,6 +7,7 @@ import Html.Attributes as H exposing (src, style, width, height)
 import Html.Events exposing (onClick, on)
 import Html.Events.Extra.Pointer as Pointer
 import Maybe exposing (Maybe)
+import Model exposing (..)
 import Lib exposing(..)
 import List.Extra exposing(find)
 import Json.Decode as D
@@ -52,12 +53,6 @@ main =
 
 -- MODEL
 
-type DragTarget = Map | Graph | StartMark | EndMark | NoTarget
-
-type Drag
-    = None
-    | Dragging DragTarget (Int, Int)  (Int, Int)
-
 
 dragTo : Drag ->  (Int, Int) -> Drag
 dragTo d dest =
@@ -76,16 +71,6 @@ dragDelta target d =
 subtractTuple (fx,fy) (tx,ty) = (fx-tx, fy-ty)
 
 
-type TrackState = Empty | Loading | Failure String | Present (List Point)
-type alias Model =
-    { centre: Coord
-    , zoom: FineZoomLevel
-    , drag: Drag
-    , startTime : Float
-    , duration : Float
-    , markedTime : (Float, Float)
-    , track: TrackState }
-
 init : () -> Url -> Nav.Key -> (Model, Cmd Msg)
 init _ url navKey =
     let (start, duration) =
diff --git a/frontend/src/Model.elm b/frontend/src/Model.elm
new file mode 100644
index 0000000..3231fd7
--- /dev/null
+++ b/frontend/src/Model.elm
@@ -0,0 +1,26 @@
+module Model exposing
+    (
+      Model
+    , TrackState(..)
+    , Drag(..)
+    , DragTarget(..)
+    )
+import TileMap exposing (FineZoomLevel, Coord)
+import Point exposing (Point)
+
+type DragTarget = Map | Graph | StartMark | EndMark | NoTarget
+
+type Drag
+    = None
+    | Dragging DragTarget (Int, Int)  (Int, Int)
+
+type TrackState = Empty | Loading | Failure String | Present (List Point)
+
+type alias Model =
+    { centre: Coord
+    , zoom: FineZoomLevel
+    , drag: Drag
+    , startTime : Float
+    , duration : Float
+    , markedTime : (Float, Float)
+    , track: TrackState }