diff --git a/MapboxDirections.swift b/MapboxDirections.swift
index 9b78282d6..c076edcf3 100644
--- a/MapboxDirections.swift
+++ b/MapboxDirections.swift
@@ -167,11 +167,11 @@ public class MBRoute {
 
 public class MBDirectionsRequest {
 
-    public enum MBDirectionsTransportType: Int {
-        case Automobile
-        case Walking
-        case Cycling
-        case Any
+    public enum MBDirectionsTransportType: String {
+        case Automobile = "driving"
+        case Walking    = "walking"
+        case Cycling    = "cycling"
+        case Any        = ""
     }
 
     public let sourceCoordinate: CLLocationCoordinate2D
@@ -229,16 +229,7 @@ public class MBDirections: NSObject {
 
         var endpoint: String
 
-        switch request.transportType {
-            case .Walking:
-                endpoint = "walking"
-            case .Cycling:
-                endpoint = "cycling"
-            default:
-                endpoint = "driving"
-        }
-
-        var serverRequestString = "http://api.tiles.mapbox.com/v4/directions/mapbox.\(endpoint)/\(self.request.sourceCoordinate.longitude),\(self.request.sourceCoordinate.latitude);\(self.request.destinationCoordinate.longitude),\(self.request.destinationCoordinate.latitude).json?access_token=\(self.accessToken)"
+        var serverRequestString = "http://api.tiles.mapbox.com/v4/directions/mapbox.\(request.transportType.rawValue)/\(self.request.sourceCoordinate.longitude),\(self.request.sourceCoordinate.latitude);\(self.request.destinationCoordinate.longitude),\(self.request.destinationCoordinate.latitude).json?access_token=\(self.accessToken)"
 
         if (self.request.requestsAlternateRoutes) {
             serverRequestString += "&alternatives=true"