diff --git a/modules/@angular/router/src/link.ts b/modules/@angular/router/src/link.ts
index 4068ce82f7..a2d05ae0c9 100644
--- a/modules/@angular/router/src/link.ts
+++ b/modules/@angular/router/src/link.ts
@@ -1,116 +1,184 @@
 import {Tree, TreeNode, UrlSegment, RouteSegment, rootNode, UrlTree, RouteTree} from './segments';
 import {isBlank, isPresent, isString, isStringMap} from './facade/lang';
+import {BaseException} from './facade/exceptions';
 import {ListWrapper} from './facade/collection';
 
-export function link(segment: RouteSegment, routeTree: RouteTree, urlTree: UrlTree,
-                     change: any[]): UrlTree {
-  if (change.length === 0) return urlTree;
+export function link(segment: RouteSegment, routeTree: RouteTree, urlTree: UrlTree, commands: any[]): UrlTree {
+  if (commands.length === 0) return urlTree;
 
-  let startingNode;
-  let normalizedChange;
-
-  if (isString(change[0]) && change[0].startsWith("./")) {
-    normalizedChange = ["/", change[0].substring(2)].concat(change.slice(1));
-    startingNode = _findStartingNode(_findUrlSegment(segment, routeTree), rootNode(urlTree));
-
-  } else if (isString(change[0]) && change.length === 1 && change[0] == "/") {
-    normalizedChange = change;
-    startingNode = rootNode(urlTree);
-
-  } else if (isString(change[0]) && !change[0].startsWith("/")) {
-    normalizedChange = ["/"].concat(change);
-    startingNode = _findStartingNode(_findUrlSegment(segment, routeTree), rootNode(urlTree));
-
-  } else {
-    normalizedChange = ["/"].concat(change);
-    startingNode = rootNode(urlTree);
+  let normalizedCommands = _normalizeCommands(commands);
+  if (_navigateToRoot(normalizedCommands)) {
+    return new UrlTree(new TreeNode<UrlSegment>(urlTree.root, []));
   }
 
-  let updated = _update(startingNode, normalizedChange);
+  let startingNode = _findStartingNode(normalizedCommands, urlTree, segment, routeTree);
+  let updated = normalizedCommands.commands.length > 0 ?
+    _updateMany(ListWrapper.clone(startingNode.children), normalizedCommands.commands) : [];
   let newRoot = _constructNewTree(rootNode(urlTree), startingNode, updated);
 
   return new UrlTree(newRoot);
 }
 
-function _findUrlSegment(segment: RouteSegment, routeTree: RouteTree): UrlSegment {
-  let s = segment;
-  let res = null;
-  while (isBlank(res)) {
-    res = ListWrapper.last(s.urlSegments);
-    s = routeTree.parent(s);
-  }
-  return res;
+function _navigateToRoot(normalizedChange:_NormalizedNavigationCommands):boolean {
+  return normalizedChange.isAbsolute && normalizedChange.commands.length === 1 && normalizedChange.commands[0] == "/";
 }
 
-function _findStartingNode(segment: UrlSegment, node: TreeNode<UrlSegment>): TreeNode<UrlSegment> {
+class _NormalizedNavigationCommands {
+  constructor(public isAbsolute: boolean,
+              public numberOfDoubleDots: number,
+              public commands: any[]) {}
+}
+
+function _normalizeCommands(commands: any[]): _NormalizedNavigationCommands {;''
+  if (isString(commands[0]) && commands.length === 1 && commands[0] == "/") {
+    return new _NormalizedNavigationCommands(true, 0, commands);
+  }
+
+  let numberOfDoubleDots = 0;
+  let isAbsolute = false;
+  let res = [];
+
+  for (let i = 0; i < commands.length; ++i) {
+    let c = commands[i];
+
+    if (!isString(c)) {
+      res.push(c);
+      continue;
+    }
+
+    let parts = c.split('/');
+    for (let j = 0; j < parts.length; ++j) {
+      let cc = parts[j];
+
+      // first exp is treated in a special way
+      if (i == 0) {
+        if (j == 0 && cc == ".") { //  './a'
+          // skip it
+        } else if (j == 0 && cc == "") { //  '/a'
+          isAbsolute = true;
+        } else if (cc == "..") { //  '../a'
+          numberOfDoubleDots++;
+        } else if (cc != '') {
+          res.push(cc);
+        }
+
+      } else {
+        if (cc != ''){
+          res.push(cc);
+        }
+      }
+    }
+  }
+
+  return new _NormalizedNavigationCommands(isAbsolute, numberOfDoubleDots, res);
+}
+
+function _findUrlSegment(segment: RouteSegment, routeTree: RouteTree, urlTree: UrlTree, numberOfDoubleDots: number): UrlSegment {
+  let s = segment;
+  while (s.urlSegments.length === 0) {
+    s = routeTree.parent(s);
+  }
+  let urlSegment = ListWrapper.last(s.urlSegments);
+  let path = urlTree.pathFromRoot(urlSegment);
+  if (path.length <= numberOfDoubleDots) {
+    throw new BaseException("Invalid number of '../'");
+  }
+  return path[path.length - 1 - numberOfDoubleDots];
+}
+
+function _findStartingNode(normalizedChange:_NormalizedNavigationCommands, urlTree:UrlTree, segment:RouteSegment, routeTree:RouteTree):TreeNode<UrlSegment> {
+  if (normalizedChange.isAbsolute) {
+    return rootNode(urlTree);
+  } else {
+    let urlSegment = _findUrlSegment(segment, routeTree, urlTree, normalizedChange.numberOfDoubleDots);
+    return _findMatchingNode(urlSegment, rootNode(urlTree));
+  }
+}
+
+function _findMatchingNode(segment: UrlSegment, node: TreeNode<UrlSegment>): TreeNode<UrlSegment> {
   if (node.value === segment) return node;
   for (var c of node.children) {
-    let r = _findStartingNode(segment, c);
+    let r = _findMatchingNode(segment, c);
     if (isPresent(r)) return r;
   }
   return null;
 }
 
 function _constructNewTree(node: TreeNode<UrlSegment>, original: TreeNode<UrlSegment>,
-                           updated: TreeNode<UrlSegment>): TreeNode<UrlSegment> {
+                           updated: TreeNode<UrlSegment>[]): TreeNode<UrlSegment> {
   if (node === original) {
-    return new TreeNode<UrlSegment>(node.value, updated.children);
+    return new TreeNode<UrlSegment>(node.value, updated);
   } else {
     return new TreeNode<UrlSegment>(
         node.value, node.children.map(c => _constructNewTree(c, original, updated)));
   }
 }
 
-function _update(node: TreeNode<UrlSegment>, changes: any[]): TreeNode<UrlSegment> {
-  let rest = changes.slice(1);
-  let outlet = _outlet(changes);
-  let segment = _segment(changes);
-  if (isString(segment) && segment[0] == "/") segment = segment.substring(1);
+function _update(node: TreeNode<UrlSegment>, commands: any[]): TreeNode<UrlSegment> {
+  let rest = commands.slice(1);
+  let next = rest.length === 0 ? null : rest[0];
+  let outlet = _outlet(commands);
+  let segment = _segment(commands);
 
   // reach the end of the tree => create new tree nodes.
-  if (isBlank(node)) {
-    let urlSegment = new UrlSegment(segment, null, outlet);
+  if (isBlank(node) && !isStringMap(next)) {
+    let urlSegment = new UrlSegment(segment, {}, outlet);
     let children = rest.length === 0 ? [] : [_update(null, rest)];
     return new TreeNode<UrlSegment>(urlSegment, children);
 
-    // different outlet => preserve the subtree
+  } else if (isBlank(node) && isStringMap(next)) {
+    let urlSegment = new UrlSegment(segment, next, outlet);
+    return _recurse(urlSegment, node, rest.slice(1));
+    
+  // different outlet => preserve the subtree
   } else if (outlet != node.value.outlet) {
     return node;
 
-    // same outlet => modify the subtree
-  } else {
-    let urlSegment = isStringMap(segment) ? new UrlSegment(null, segment, null) :
-                                            new UrlSegment(segment, null, outlet);
-    if (rest.length === 0) {
-      return new TreeNode<UrlSegment>(urlSegment, []);
-    }
+  // params command
+  } else if (isStringMap(segment)) {
+    let newSegment = new UrlSegment(node.value.segment, segment, node.value.outlet);
+    return _recurse(newSegment, node, rest);
 
-    return new TreeNode<UrlSegment>(urlSegment,
-                                    _updateMany(ListWrapper.clone(node.children), rest));
+  // next one is a params command
+  } else if (isStringMap(next)) {
+    let urlSegment = new UrlSegment(segment, next, outlet);
+    return _recurse(urlSegment, node, rest.slice(1));
+
+  // next one is not a params command
+  } else {
+    let urlSegment = new UrlSegment(segment, {}, outlet);
+    return _recurse(urlSegment, node, rest);
   }
 }
 
-function _updateMany(nodes: TreeNode<UrlSegment>[], changes: any[]): TreeNode<UrlSegment>[] {
-  let outlet = _outlet(changes);
+function _recurse(urlSegment: UrlSegment, node: TreeNode<UrlSegment>, rest: any[]): TreeNode<UrlSegment> {
+  if (rest.length === 0) {
+    return new TreeNode<UrlSegment>(urlSegment, []);
+  }
+  return new TreeNode<UrlSegment>(urlSegment, _updateMany(ListWrapper.clone(node.children), rest));
+}
+
+function _updateMany(nodes: TreeNode<UrlSegment>[], commands: any[]): TreeNode<UrlSegment>[] {
+  let outlet = _outlet(commands);
   let nodesInRightOutlet = nodes.filter(c => c.value.outlet == outlet);
   if (nodesInRightOutlet.length > 0) {
     let nodeRightOutlet = nodesInRightOutlet[0];  // there can be only one
-    nodes[nodes.indexOf(nodeRightOutlet)] = _update(nodeRightOutlet, changes);
+    nodes[nodes.indexOf(nodeRightOutlet)] = _update(nodeRightOutlet, commands);
   } else {
-    nodes.push(_update(null, changes));
+    nodes.push(_update(null, commands));
   }
 
   return nodes;
 }
 
-function _segment(changes: any[]): any {
-  if (!isString(changes[0])) return changes[0];
-  let parts = changes[0].toString().split(":");
-  return parts.length > 1 ? parts[1] : changes[0];
+function _segment(commands: any[]): any {
+  if (!isString(commands[0])) return commands[0];
+  let parts = commands[0].toString().split(":");
+  return parts.length > 1 ? parts[1] : commands[0];
 }
 
-function _outlet(changes: any[]): string {
-  if (!isString(changes[0])) return null;
-  let parts = changes[0].toString().split(":");
+function _outlet(commands: any[]): string {
+  if (!isString(commands[0])) return null;
+  let parts = commands[0].toString().split(":");
   return parts.length > 1 ? parts[0] : null;
 }
diff --git a/modules/@angular/router/src/recognize.ts b/modules/@angular/router/src/recognize.ts
index 5fdcf9fcb0..972c034b77 100644
--- a/modules/@angular/router/src/recognize.ts
+++ b/modules/@angular/router/src/recognize.ts
@@ -11,7 +11,7 @@ import {reflector} from '@angular/core';
 // TODO: vsavkin: recognize should take the old tree and merge it
 export function recognize(componentResolver: ComponentResolver, type: Type,
                           url: UrlTree): Promise<RouteTree> {
-  let matched = new _MatchResult(type, [url.root], null, rootNode(url).children, []);
+  let matched = new _MatchResult(type, [url.root], {}, rootNode(url).children, []);
   return _constructSegment(componentResolver, matched).then(roots => new RouteTree(roots[0]));
 }
 
@@ -82,7 +82,7 @@ function _recognizeLeftOvers(componentResolver: ComponentResolver,
                 return componentResolver.resolveComponent(r[0].component)
                     .then(factory => {
                       let segment =
-                          new RouteSegment([], null, DEFAULT_OUTLET_NAME, r[0].component, factory);
+                          new RouteSegment([], {}, DEFAULT_OUTLET_NAME, r[0].component, factory);
                       return [new TreeNode<RouteSegment>(segment, children)];
                     });
               });
@@ -142,14 +142,9 @@ function _matchWithParts(route: RouteMetadata, url: TreeNode<UrlSegment>): _Matc
     current = ListWrapper.first(current.children);
   }
 
-  if (isPresent(current) && isBlank(current.value.segment)) {
-    lastParent = lastSegment;
-    lastSegment = current;
-  }
-
   let p = lastSegment.value.parameters;
   let parameters =
-      <{[key: string]: string}>StringMapWrapper.merge(isBlank(p) ? {} : p, positionalParams);
+      <{[key: string]: string}>StringMapWrapper.merge(p, positionalParams);
   let axuUrlSubtrees = isPresent(lastParent) ? lastParent.children.slice(1) : [];
 
   return new _MatchResult(route.component, consumedUrlSegments, parameters, lastSegment.children,
diff --git a/modules/@angular/router/src/router_url_serializer.ts b/modules/@angular/router/src/router_url_serializer.ts
index e68d3958f0..ada4462f3d 100644
--- a/modules/@angular/router/src/router_url_serializer.ts
+++ b/modules/@angular/router/src/router_url_serializer.ts
@@ -30,8 +30,7 @@ function _serializeUrlTreeNodes(nodes: TreeNode<UrlSegment>[]): string {
 
 function _serializeChildren(node: TreeNode<UrlSegment>): string {
   if (node.children.length > 0) {
-    let slash = isBlank(node.children[0].value.segment) ? "" : "/";
-    return `${slash}${_serializeUrlTreeNodes(node.children)}`;
+    return `/${_serializeUrlTreeNodes(node.children)}`;
   } else {
     return "";
   }
@@ -63,7 +62,7 @@ class _UrlParser {
   parse(url: string): TreeNode<UrlSegment> {
     this._remaining = url;
     if (url == '' || url == '/') {
-      return new TreeNode<UrlSegment>(new UrlSegment('', null, null), []);
+      return new TreeNode<UrlSegment>(new UrlSegment('', {}, null), []);
     } else {
       return this.parseRoot();
     }
@@ -71,8 +70,7 @@ class _UrlParser {
 
   parseRoot(): TreeNode<UrlSegment> {
     let segments = this.parseSegments();
-    let queryParams = this.peekStartsWith('?') ? this.parseQueryParams() : null;
-    return new TreeNode<UrlSegment>(new UrlSegment('', queryParams, null), segments);
+    return new TreeNode<UrlSegment>(new UrlSegment('', {}, null), segments);
   }
 
   parseSegments(outletName: string = null): TreeNode<UrlSegment>[] {
@@ -92,7 +90,7 @@ class _UrlParser {
       path = parts[1];
     }
 
-    var matrixParams: {[key: string]: any} = null;
+    var matrixParams: {[key: string]: any} = {};
     if (this.peekStartsWith(';')) {
       matrixParams = this.parseMatrixParams();
     }
@@ -108,16 +106,9 @@ class _UrlParser {
       children = this.parseSegments();
     }
 
-    if (isPresent(matrixParams)) {
-      let matrixParamsSegment = new UrlSegment(null, matrixParams, null);
-      let matrixParamsNode = new TreeNode<UrlSegment>(matrixParamsSegment, children);
-      let segment = new UrlSegment(path, null, outletName);
-      return [new TreeNode<UrlSegment>(segment, [matrixParamsNode].concat(aux))];
-    } else {
-      let segment = new UrlSegment(path, null, outletName);
-      let node = new TreeNode<UrlSegment>(segment, children);
-      return [node].concat(aux);
-    }
+    let segment = new UrlSegment(path, matrixParams, outletName);
+    let node = new TreeNode<UrlSegment>(segment, children);
+    return [node].concat(aux);
   }
 
   parseQueryParams(): {[key: string]: any} {
diff --git a/modules/@angular/router/src/segments.ts b/modules/@angular/router/src/segments.ts
index 70d4ec8914..ea2228e71e 100644
--- a/modules/@angular/router/src/segments.ts
+++ b/modules/@angular/router/src/segments.ts
@@ -90,21 +90,18 @@ export class TreeNode<T> {
 }
 
 export class UrlSegment {
-  constructor(public segment: any, public parameters: {[key: string]: string},
+  constructor(public segment: any, public parameters: {[key: string]: any},
               public outlet: string) {}
 
   toString(): string {
     let outletPrefix = isBlank(this.outlet) ? "" : `${this.outlet}:`;
-    let segmentPrefix = isBlank(this.segment) ? "" : this.segment;
-    return `${outletPrefix}${segmentPrefix}${_serializeParams(this.parameters)}`;
+    return `${outletPrefix}${this.segment}${_serializeParams(this.parameters)}`;
   }
 }
 
 function _serializeParams(params: {[key: string]: string}): string {
   let res = "";
-  if (isPresent(params)) {
-    StringMapWrapper.forEach(params, (v, k) => res += `;${k}=${v}`);
-  }
+  StringMapWrapper.forEach(params, (v, k) => res += `;${k}=${v}`);
   return res;
 }
 
@@ -115,7 +112,7 @@ export class RouteSegment {
   /** @internal */
   _componentFactory: ComponentFactory<any>;
 
-  constructor(public urlSegments: UrlSegment[], public parameters: {[key: string]: string},
+  constructor(public urlSegments: UrlSegment[], public parameters: {[key: string]: any},
               public outlet: string, type: Type, componentFactory: ComponentFactory<any>) {
     this._type = type;
     this._componentFactory = componentFactory;
@@ -145,9 +142,6 @@ export function equalSegments(a: RouteSegment, b: RouteSegment): boolean {
   if (!isBlank(a) && isBlank(b)) return false;
   if (a._type !== b._type) return false;
   if (a.outlet != b.outlet) return false;
-  if (isBlank(a.parameters) && !isBlank(b.parameters)) return false;
-  if (!isBlank(a.parameters) && isBlank(b.parameters)) return false;
-  if (isBlank(a.parameters) && isBlank(b.parameters)) return true;
   return StringMapWrapper.equals(a.parameters, b.parameters);
 }
 
@@ -156,9 +150,12 @@ export function equalUrlSegments(a: UrlSegment, b: UrlSegment): boolean {
   if (!isBlank(a) && isBlank(b)) return false;
   if (a.segment != b.segment) return false;
   if (a.outlet != b.outlet) return false;
-  if (isBlank(a.parameters) && !isBlank(b.parameters)) return false;
-  if (!isBlank(a.parameters) && isBlank(b.parameters)) return false;
-  if (isBlank(a.parameters) && isBlank(b.parameters)) return true;
+  if (isBlank(a.parameters)) {
+    console.log("a", a);
+  }
+  if (isBlank(b.parameters)) {
+    console.log("b", b);
+  }
   return StringMapWrapper.equals(a.parameters, b.parameters);
 }
 
diff --git a/modules/@angular/router/test/link_spec.ts b/modules/@angular/router/test/link_spec.ts
index e844126a4d..215e6bbbed 100644
--- a/modules/@angular/router/test/link_spec.ts
+++ b/modules/@angular/router/test/link_spec.ts
@@ -27,68 +27,142 @@ export function main() {
       expect(t).toBe(p);
     });
 
-    it("should support going to root", () => {
+    it("should navigate to the root", () => {
       let p = parser.parse("/");
       let tree = s(p.root);
       let t = link(tree.root, tree, p, ["/"]);
       expect(parser.serialize(t)).toEqual("");
     });
 
-    it("should support positional params", () => {
+    it("should support nested segments", () => {
       let p = parser.parse("/a/b");
       let tree = s(p.firstChild(p.root));
       let t = link(tree.root, tree, p, ["/one", 11, "two", 22]);
       expect(parser.serialize(t)).toEqual("/one/11/two/22");
     });
 
-    it("should preserve route siblings when changing the main route", () => {
+    it("should preserve siblings", () => {
       let p = parser.parse("/a/11/b(c)");
       let tree = s(p.root);
       let t = link(tree.root, tree, p, ["/a", 11, 'd']);
       expect(parser.serialize(t)).toEqual("/a/11/d(aux:c)");
     });
 
-    it("should preserve route siblings when changing a aux route", () => {
-      let p = parser.parse("/a/11/b(c)");
-      let tree = s(p.root);
-      let t = link(tree.root, tree, p, ["/a", 11, 'aux:d']);
-      expect(parser.serialize(t)).toEqual("/a/11/b(aux:d)");
-    });
-
-    it('should update parameters', () => {
+    it('should update matrix parameters', () => {
       let p = parser.parse("/a;aa=11");
       let tree = s(p.root);
       let t = link(tree.root, tree, p, ["/a", {aa: 22, bb: 33}]);
       expect(parser.serialize(t)).toEqual("/a;aa=22;bb=33");
     });
 
-    it("should update relative subtree (when starts with ./)", () => {
-      let p = parser.parse("/a(ap)/c(cp)");
-      let c = p.firstChild(p.root);
-      let tree = s(c);
-      let t = link(tree.root, tree, p, ["./c2"]);
-      expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+    it('should create matrix parameters', () => {
+      let p = parser.parse("/a");
+      let tree = s(p.root);
+      let t = link(tree.root, tree, p, ["/a", {aa: 22, bb: 33}]);
+      expect(parser.serialize(t)).toEqual("/a;aa=22;bb=33");
     });
 
-    it("should update relative subtree (when does not start with ./)", () => {
-      let p = parser.parse("/a(ap)/c(cp)");
-      let c = p.firstChild(p.root);
-      let tree = s(c);
-      let t = link(tree.root, tree, p, ["c2"]);
-      expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+    it('should create matrix parameters together with other segments', () => {
+      let p = parser.parse("/a");
+      let tree = s(p.root);
+      let t = link(tree.root, tree, p, ["/a", "/b", {aa: 22, bb: 33}]);
+      expect(parser.serialize(t)).toEqual("/a/b;aa=22;bb=33");
     });
 
-    it("should update relative subtree when the provided segment doesn't have url segments", () => {
-      let p = parser.parse("/a(ap)/c(cp)");
-      let c = p.firstChild(p.root);
+    describe("relative navigation", () => {
+      it("should work", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["c2"]);
+        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+      });
 
-      let child = new RouteSegment([], null, null, null, null);
-      let root = new TreeNode<RouteSegment>(new RouteSegment([c], {}, null, null, null),
-                                            [new TreeNode<RouteSegment>(child, [])]);
-      let tree = new RouteTree(root);
+      it("should work when the first command starts with a ./", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["./c2"]);
+        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+      });
 
-      let t = link(child, tree, p, ["./c2"]);
-      expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+      it("should work when the first command is ./)", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["./", "c2"]);
+        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+      });
+
+      it("should work when given params", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, [{'x': 99}]);
+
+        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c;x=99(aux:cp)");
+      });
+
+      it("should support going to a parent", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let a = p.firstChild(p.root);
+        let tree = s(a);
+        let t = link(tree.root, tree, p, ["../a2"]);
+        expect(parser.serialize(t)).toEqual("/a2(aux:ap)");
+      });
+
+      it("should support going to a parent (nested case)", () => {
+        let p = parser.parse("/a/c");
+        let c = p.firstChild(p.firstChild(p.root));
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["../c2"]);
+        expect(parser.serialize(t)).toEqual("/a/c2");
+      });
+
+      it("should work when given ../", () => {
+        let p = parser.parse("/a/c");
+        let c = p.firstChild(p.firstChild(p.root));
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["../"]);
+        expect(parser.serialize(t)).toEqual("/a");
+      });
+
+      it("should navigate to the root", () => {
+        let p = parser.parse("/a/c");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["../"]);
+        expect(parser.serialize(t)).toEqual("");
+      });
+
+      it("should support setting matrix params", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+        let t = link(tree.root, tree, p, ["../", {'x': 5}]);
+        expect(parser.serialize(t)).toEqual("/a;x=5(aux:ap)");
+      });
+
+      it("should throw when too many ..", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+        let tree = s(c);
+
+        expect(() => link(tree.root, tree, p, ["../../"])).toThrowError("Invalid number of '../'");
+      });
+
+      it("should work when the provided segment doesn't have url segments", () => {
+        let p = parser.parse("/a(ap)/c(cp)");
+        let c = p.firstChild(p.root);
+
+        let child = new RouteSegment([], {'one':1}, null, null, null);
+        let root = new TreeNode<RouteSegment>(new RouteSegment([c], {}, null, null, null),
+          [new TreeNode<RouteSegment>(child, [])]);
+        let tree = new RouteTree(root);
+
+        let t = link(child, tree, p, ["./c2"]);
+        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
+      });
     });
   });
 }
diff --git a/modules/@angular/router/test/router_url_serializer_spec.ts b/modules/@angular/router/test/router_url_serializer_spec.ts
index 688dc32fde..4dd1c9badc 100644
--- a/modules/@angular/router/test/router_url_serializer_spec.ts
+++ b/modules/@angular/router/test/router_url_serializer_spec.ts
@@ -79,17 +79,11 @@ export function main() {
 
     it("should parse key-value matrix params", () => {
       let tree = url.parse("/one;a=11a;b=11b(/two;c=22//right:three;d=33)");
+      let c = tree.children(tree.root);
 
-      let c = tree.firstChild(tree.root);
-      expectSegment(c, "one");
-
-      let c2 = tree.children(c);
-      expectSegment(c2[0], ";a=11a;b=11b");
-      expectSegment(c2[1], "aux:two");
-      expectSegment(c2[2], "right:three");
-
-      expectSegment(tree.firstChild(c2[1]), ";c=22");
-      expectSegment(tree.firstChild(c2[2]), ";d=33");
+      expectSegment(c[0], "one;a=11a;b=11b");
+      expectSegment(c[1], "aux:two;c=22");
+      expectSegment(c[2], "right:three;d=33");
 
       expect(url.serialize(tree)).toEqual("/one;a=11a;b=11b(aux:two;c=22//right:three;d=33)");
     });
@@ -98,8 +92,7 @@ export function main() {
       let tree = url.parse("/one;a");
 
       let c = tree.firstChild(tree.root);
-      expectSegment(c, "one");
-      expectSegment(tree.firstChild(c), ";a=true");
+      expectSegment(c, "one;a=true");
 
       expect(url.serialize(tree)).toEqual("/one;a=true");
     });