diff --git a/src/entities/InterchangeSystem.ts b/src/entities/InterchangeSystem.ts
index 2cb9072..37aed58 100644
--- a/src/entities/InterchangeSystem.ts
+++ b/src/entities/InterchangeSystem.ts
@@ -71,6 +71,7 @@ export class InterchangeSystem {
       shuttleRepository,
       notificationRepository,
       new AppleNotificationSender(),
+      args.id,
     );
     notificationScheduler.startListeningForUpdates();
 
@@ -115,6 +116,7 @@ export class InterchangeSystem {
       shuttleRepository,
       notificationRepository,
       new AppleNotificationSender(false),
+      args.id,
     );
     notificationScheduler.startListeningForUpdates();
 
diff --git a/src/notifications/schedulers/ETANotificationScheduler.ts b/src/notifications/schedulers/ETANotificationScheduler.ts
index 97a2d4d..b269982 100644
--- a/src/notifications/schedulers/ETANotificationScheduler.ts
+++ b/src/notifications/schedulers/ETANotificationScheduler.ts
@@ -13,7 +13,8 @@ export class ETANotificationScheduler {
   constructor(
     private shuttleRepository: ShuttleGetterRepository,
     private notificationRepository: NotificationRepository = new InMemoryNotificationRepository(),
-    private appleNotificationSender = new AppleNotificationSender()
+    private appleNotificationSender = new AppleNotificationSender(),
+    private interchangeSystemId: string,
   ) {
     this.etaSubscriberCallback = this.etaSubscriberCallback.bind(this);
     this.sendEtaNotificationImmediately = this.sendEtaNotificationImmediately.bind(this);
@@ -45,6 +46,11 @@ export class ETANotificationScheduler {
     const notificationAlertArguments: NotificationAlertArguments = {
       title: "Shuttle is arriving",
       body: `Shuttle is approaching ${stop.name} in ${Math.ceil(eta.secondsRemaining / 60)} minutes.`,
+      customKeys: {
+        shuttleId,
+        stopId,
+        systemId: this.interchangeSystemId,
+      },
     }
     return this.appleNotificationSender.sendNotificationImmediately(deviceId, notificationAlertArguments);
   }
diff --git a/src/notifications/senders/AppleNotificationSender.ts b/src/notifications/senders/AppleNotificationSender.ts
index 8e5904a..2f458af 100644
--- a/src/notifications/senders/AppleNotificationSender.ts
+++ b/src/notifications/senders/AppleNotificationSender.ts
@@ -10,6 +10,7 @@ interface APNsUrl {
 export interface NotificationAlertArguments {
   title: string;
   body: string;
+  customKeys?: any,
 }
 
 export class AppleNotificationSender {
@@ -106,12 +107,21 @@ export class AppleNotificationSender {
           resolve();
         });
 
-        req.write(JSON.stringify({
+        const customKeys = {
+          ...notificationAlertArguments.customKeys,
+        }
+        delete notificationAlertArguments.customKeys;
+
+        // See https://developer.apple.com/documentation/usernotifications/generating-a-remote-notification
+        // for notification payload examples
+        const payload = JSON.stringify({
           aps: {
             alert: notificationAlertArguments,
             sound: "default"
-          }
-        }));
+          },
+          customKeys,
+        });
+        req.write(payload);
         req.end();
       });
       return true;
diff --git a/test/notifications/schedulers/ETANotificationSchedulerTests.test.ts b/test/notifications/schedulers/ETANotificationSchedulerTests.test.ts
index b9f1790..db6a94b 100644
--- a/test/notifications/schedulers/ETANotificationSchedulerTests.test.ts
+++ b/test/notifications/schedulers/ETANotificationSchedulerTests.test.ts
@@ -40,7 +40,8 @@ describe("ETANotificationScheduler", () => {
     notificationService = new ETANotificationScheduler(
       shuttleRepository,
       notificationRepository,
-      appleNotificationSender
+      appleNotificationSender,
+      "1",
     );
     notificationService.startListeningForUpdates();
   });
@@ -127,7 +128,8 @@ describe("ETANotificationScheduler", () => {
       notificationService = new ETANotificationScheduler(
         shuttleRepository,
         notificationRepository,
-        updatedNotificationSender
+        updatedNotificationSender,
+        "1",
       );
       notificationService.startListeningForUpdates();
 
diff --git a/test/notifications/senders/AppleNotificationSenderTests.test.ts b/test/notifications/senders/AppleNotificationSenderTests.test.ts
index 9cbc0cb..948be7d 100644
--- a/test/notifications/senders/AppleNotificationSenderTests.test.ts
+++ b/test/notifications/senders/AppleNotificationSenderTests.test.ts
@@ -5,7 +5,6 @@ import {
   AppleNotificationSender,
   NotificationAlertArguments
 } from "../../../src/notifications/senders/AppleNotificationSender";
-import { ETANotificationScheduler } from "../../../src/notifications/schedulers/ETANotificationScheduler";
 
 jest.mock("http2");
 
@@ -13,7 +12,7 @@ const sampleKeyBase64 = "LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCk1JR1RBZ0VBTUJNR0J
 
 function mockHttp2Connect(status: number) {
   class MockClient extends EventEmitter {
-    request = jest.fn((headers: any) => {
+    request = jest.fn((_) => {
       const mockRequest: any = new EventEmitter();
       mockRequest.setEncoding = jest.fn();
       mockRequest.write = jest.fn();