diff --git a/modules/@angular/router/src/directives/router_link.ts b/modules/@angular/router/src/directives/router_link.ts
index 2f2f230053..fac4328f28 100644
--- a/modules/@angular/router/src/directives/router_link.ts
+++ b/modules/@angular/router/src/directives/router_link.ts
@@ -40,6 +40,9 @@ export class RouterLink {
   // the url displayed on the anchor element.
   @HostBinding() href: string;
 
+  /**
+   * @internal
+   */
   constructor(private router: Router, private route: ActivatedRoute) {}
 
   @Input()
@@ -51,8 +54,7 @@ export class RouterLink {
     }
     this.updateTargetUrlAndHref();
   }
-
-
+  
   @HostListener("click")
   onClick(): boolean {
     // If no target, or if target is _self, prevent default browser behavior
diff --git a/modules/@angular/router/src/directives/router_outlet.ts b/modules/@angular/router/src/directives/router_outlet.ts
index 4fb9857621..dfa2e670d6 100644
--- a/modules/@angular/router/src/directives/router_outlet.ts
+++ b/modules/@angular/router/src/directives/router_outlet.ts
@@ -7,8 +7,11 @@ export class RouterOutlet {
   private activated:ComponentRef<any>|null;
   public outletMap:RouterOutletMap;
 
+  /**
+   * @internal
+   */
   constructor(parentOutletMap:RouterOutletMap, private location:ViewContainerRef,
-              @Attribute('name') name:string, public injector: Injector) {
+              @Attribute('name') name:string) {
     parentOutletMap.registerOutlet(name ? name : PRIMARY_OUTLET, this);
   }
 
@@ -28,7 +31,7 @@ export class RouterOutlet {
   activate(factory: ComponentFactory<any>, providers: ResolvedReflectiveProvider[],
            outletMap: RouterOutletMap): void {
     this.outletMap = outletMap;
-    let inj = ReflectiveInjector.fromResolvedProviders(providers, this.location.parentInjector);
+    const inj = ReflectiveInjector.fromResolvedProviders(providers, this.location.parentInjector);
     this.activated = this.location.createComponent(factory, this.location.length, inj, []);
   }
 }
diff --git a/modules/@angular/router/src/router_state.ts b/modules/@angular/router/src/router_state.ts
index 79e97cd321..2de22a310a 100644
--- a/modules/@angular/router/src/router_state.ts
+++ b/modules/@angular/router/src/router_state.ts
@@ -23,6 +23,9 @@ import { Type, ComponentFactory } from '@angular/core';
  * ```
  */
 export class RouterState extends Tree<ActivatedRoute> {
+  /**
+   * @internal
+   */
   constructor(root: TreeNode<ActivatedRoute>, public queryParams: Observable<Params>, public fragment: Observable<string>, public snapshot: RouterStateSnapshot) {
     super(root);
   }
@@ -68,6 +71,9 @@ export class ActivatedRoute {
   _futureSnapshot: ActivatedRouteSnapshot;
   snapshot: ActivatedRouteSnapshot;
 
+  /**
+   * @internal
+   */
   constructor(public urlSegments: Observable<UrlSegment[]>,
               public params: Observable<Params>,
               public outlet: string,
@@ -103,6 +109,9 @@ export class ActivatedRouteSnapshot {
   /** @internal **/
   _lastUrlSegment: UrlSegment;
 
+  /**
+   * @internal
+   */
   constructor(public urlSegments: UrlSegment[],
               public params: Params,
               public outlet: string,
@@ -128,6 +137,9 @@ export class ActivatedRouteSnapshot {
  * ```
  */
 export class RouterStateSnapshot extends Tree<ActivatedRouteSnapshot> {
+  /**
+   * @internal
+   */
   constructor(root: TreeNode<ActivatedRouteSnapshot>, public queryParams: Params, public fragment: string | null) {
     super(root);
   }
diff --git a/modules/@angular/router/src/url_tree.ts b/modules/@angular/router/src/url_tree.ts
index 84608c0542..1837aff783 100644
--- a/modules/@angular/router/src/url_tree.ts
+++ b/modules/@angular/router/src/url_tree.ts
@@ -10,12 +10,18 @@ export function createEmptyUrlTree() {
  * A URL in the tree form.
  */
 export class UrlTree extends Tree<UrlSegment> {
+  /**
+   * @internal
+   */
   constructor(root: TreeNode<UrlSegment>, public queryParameters: {[key: string]: string}, public fragment: string | null) {
     super(root);
   }
 }
 
 export class UrlSegment {
+  /**
+   * @internal
+   */
   constructor(public path: string, public parameters: {[key: string]: string}, public outlet: string) {}
 
   toString() {