@@ -773,7 +773,14 @@ export class Router {
     this.routerState.root.component = this.rootComponentType;
   }
 
-  private getTransition(): NavigationTransition { return this.transitions.value; }
+  private getTransition(): NavigationTransition {
+    const transition = this.transitions.value;
+    // This value needs to be set. Other values such as extractedUrl are set on initial navigation
+    // but the urlAfterRedirects may not get set if we aren't processing the new URL *and* not
+    // processing the previous URL.
+    transition.urlAfterRedirects = this.browserUrlTree;
+    return transition;
+  }
 
   private setTransition(t: Partial<NavigationTransition>): void {
     this.transitions.next({...this.getTransition(), ...t});
 
@@ -218,6 +218,39 @@ describe('Integration', () => {
        })));
   });
 
+
+  /**
+   * get/setTransition are private APIs. This test is needed though to guarantee the correct
+   * values are being used. Related to https://github.com/angular/angular/issues/30340 where
+   * stale transition data was being used when kicking off a new navigation.
+   */
+  describe('get/setTransition', () => {
+    it('should provide the most recent NavigationTransition',
+       fakeAsync(inject([Router, Location], (router: Router, location: SpyLocation) => {
+         router.resetConfig([
+           {path: '', component: SimpleCmp}, {path: 'a', component: SimpleCmp},
+           {path: 'b', component: SimpleCmp}
+         ]);
+
+         const fixture = createRoot(router, RootCmp);
+
+         const initialTransition = (router as any).getTransition();
+
+         // Confirm initial value
+         expect(initialTransition.urlAfterRedirects.toString()).toBe('/');
+
+
+         router.navigateByUrl('/a', {replaceUrl: true});
+
+         tick();
+
+         // After a navigation, we should see the URL after redirect
+         const nextTransition = (router as any).getTransition();
+         // Confirm initial value
+         expect(nextTransition.urlAfterRedirects.toString()).toBe('/a');
+       })));
+  });
+
   describe('navigation warning', () => {
     let warnings: string[] = [];
 
@@ -662,6 +695,33 @@ describe('Integration', () => {
          expect(location.path()).toEqual('/login');
        })));
 
+    it('should set browserUrlTree with urlUpdateStrategy="eagar" and false `shouldProcessUrl`',
+       fakeAsync(inject([Router, Location], (router: Router, location: Location) => {
+         const fixture = TestBed.createComponent(RootCmp);
+         advance(fixture);
+
+         router.urlUpdateStrategy = 'eager';
+
+         router.resetConfig([
+           {path: 'team/:id', component: SimpleCmp},
+           {path: 'login', component: AbsoluteSimpleLinkCmp}
+         ]);
+
+         router.navigateByUrl('/team/22');
+         advance(fixture, 1);
+
+         expect((router as any).browserUrlTree.toString()).toBe('/team/22');
+
+         // Force to not process URL changes
+         router.urlHandlingStrategy.shouldProcessUrl = (url: UrlTree) => false;
+
+         router.navigateByUrl('/login');
+         advance(fixture, 1);
+
+         // Do not change locations
+         expect((router as any).browserUrlTree.toString()).toBe('/team/22');
+       })));
+
     it('should eagerly update URL after redirects are applied with urlUpdateStrategy="eagar"',
        fakeAsync(inject([Router, Location], (router: Router, location: Location) => {
          const fixture = TestBed.createComponent(RootCmp);