diff --git a/google/maps/fleetengine/delivery/v1/delivery_api.proto b/google/maps/fleetengine/delivery/v1/delivery_api.proto
index 449ed26358..3c5745224b 100644
--- a/google/maps/fleetengine/delivery/v1/delivery_api.proto
+++ b/google/maps/fleetengine/delivery/v1/delivery_api.proto
@@ -406,6 +406,12 @@ message CreateTaskRequest {
   // * `planned_location` (optional for `UNAVAILABLE` tasks)
   // * `task_duration`
   //
+  // The following fields can be optionally set:
+  //
+  // * `target_time_window`
+  // * `task_tracking_view_config`
+  // * `attributes`
+  //
   // Note: The Task's `name` field is ignored. All other Task fields must not be
   // set; otherwise, an error is returned.
   Task task = 4 [(google.api.field_behavior) = REQUIRED];
diff --git a/google/maps/fleetengine/delivery/v1/delivery_vehicles.proto b/google/maps/fleetengine/delivery/v1/delivery_vehicles.proto
index 3314b1af70..489de74a2b 100644
--- a/google/maps/fleetengine/delivery/v1/delivery_vehicles.proto
+++ b/google/maps/fleetengine/delivery/v1/delivery_vehicles.proto
@@ -73,6 +73,14 @@ message DeliveryVehicle {
   // The last reported location of the Delivery Vehicle.
   DeliveryVehicleLocation last_location = 2;
 
+  // Input only. Locations where this Delivery Vehicle has been in the past that
+  // haven't yet been reported to Fleet Engine. This is used in
+  // `UpdateDeliveryVehicleRequest` to record locations which were previously
+  // unable to be sent to the server. Typically this happens when the Delivery
+  // Vehicle does not have internet connectivity.
+  repeated DeliveryVehicleLocation past_locations = 12
+      [(google.api.field_behavior) = INPUT_ONLY];
+
   // The Delivery Vehicle's navigation status.
   DeliveryVehicleNavigationStatus navigation_status = 3;
 
diff --git a/google/maps/fleetengine/v1/fleetengine.proto b/google/maps/fleetengine/v1/fleetengine.proto
index d88579bc58..99fe71b639 100644
--- a/google/maps/fleetengine/v1/fleetengine.proto
+++ b/google/maps/fleetengine/v1/fleetengine.proto
@@ -17,6 +17,7 @@ syntax = "proto3";
 package maps.fleetengine.v1;
 
 import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
 import "google/maps/fleetengine/v1/traffic.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
diff --git a/google/maps/fleetengine/v1/vehicles.proto b/google/maps/fleetengine/v1/vehicles.proto
index 67d49f29cd..88a9068b4c 100644
--- a/google/maps/fleetengine/v1/vehicles.proto
+++ b/google/maps/fleetengine/v1/vehicles.proto
@@ -86,6 +86,14 @@ message Vehicle {
   // Last reported location of the vehicle.
   VehicleLocation last_location = 5;
 
+  // Input only. Locations where this vehicle has been in the past that haven't
+  // yet been reported to Fleet Engine. This is used in `UpdateVehicleRequest`
+  // to record locations which were previously unable to be sent to the server.
+  // Typically this happens when the vehicle does not have internet
+  // connectivity.
+  repeated VehicleLocation past_locations = 30
+      [(google.api.field_behavior) = INPUT_ONLY];
+
   // The total numbers of riders this vehicle can carry.  The driver is not
   // considered in this value. This value must be greater than or equal to one.
   int32 maximum_capacity = 6;