diff --git a/TRViS.LocationService/LonLatLocationService.cs b/TRViS.LocationService/LonLatLocationService.cs
index 48ecd100..55dc0cc0 100644
--- a/TRViS.LocationService/LonLatLocationService.cs
+++ b/TRViS.LocationService/LonLatLocationService.cs
@@ -22,7 +22,6 @@ public StaLocationInfo[]? StaLocationInfo
 
 			_staLocationInfo = value;
 			ResetLocationInfo();
-			LocationStateChanged?.Invoke(this, new(CurrentStationIndex, IsRunningToNextStation));
 		}
 	}
 
@@ -46,6 +45,9 @@ void ResetLocationInfo(bool invokeEvent)
 
 	static int GetPastStationIndex(in StaLocationInfo[] staLocationInfo, int currentStationIndex)
 	{
+		if (currentStationIndex <= 0)
+			return CURRENT_STATION_INDEX_NOT_SET;
+
 		for (int i = currentStationIndex - 1; i >= 0; i--)
 		{
 			if (staLocationInfo[i].HasLonLatLocation)
@@ -233,6 +235,11 @@ public double SetCurrentLocation(double lon_deg, double lat_deg)
 			// LastStationであれば、RunningToNextStationはfalseであるはずである。
 			// -> 次の駅は必ず存在する
 			int nextStationIndex = GetNextStationIndex(StaLocationInfo, CurrentStationIndex);
+			if (nextStationIndex < 0)
+			{
+				// 入るはずはないけども、念のため。
+				return double.NaN;
+			}
 			StaLocationInfo nextStation = StaLocationInfo[nextStationIndex];
 			distance = Utils.CalculateDistance_m(nextStation, new LocationLonLat_deg(lon_deg, lat_deg));
 			double distanceToNextStationAverage = GetDistanceToStationAverage(nextStation, lon_deg, lat_deg);
diff --git a/TRViS/DTAC/VerticalTimetableView.Init.cs b/TRViS/DTAC/VerticalTimetableView.Init.cs
index ce0dd2d3..18a76b3f 100644
--- a/TRViS/DTAC/VerticalTimetableView.Init.cs
+++ b/TRViS/DTAC/VerticalTimetableView.Init.cs
@@ -49,6 +49,7 @@ public VerticalTimetableView()
 		Grid.SetColumnSpan(CurrentLocationLine, 8);
 
 		LocationService.LocationStateChanged += LocationService_LocationStateChanged;
+		LocationService.IsEnabledChanged += (_, e) => IsLocationServiceEnabled = e.NewValue;
 		LocationService.ExceptionThrown += (s, e) =>
 		{
 			MainThread.BeginInvokeOnMainThread(() => Shell.Current.DisplayAlert("Location Service Error", e.ToString(), "OK"));
diff --git a/TRViS/Services/LocationService.cs b/TRViS/Services/LocationService.cs
index 875cac61..9542fdee 100644
--- a/TRViS/Services/LocationService.cs
+++ b/TRViS/Services/LocationService.cs
@@ -23,6 +23,7 @@ public partial class LocationService : ObservableObject, IDisposable
 
 	[ObservableProperty]
 	bool _IsEnabled;
+	public event EventHandler<ValueChangedEventArgs<bool>>? IsEnabledChanged;
 
 	readonly LonLatLocationService LonLatLocationService;
 
@@ -67,6 +68,7 @@ partial void OnIsEnabledChanged(bool value)
 			logger.Info("IsEnabled is changed to true -> start GPS");
 			Task.Run(StartGPS);
 		}
+		IsEnabledChanged?.Invoke(this, new ValueChangedEventArgs<bool>(!value, value));
 	}
 
 	public void SetTimetableRows(TimetableRow[]? timetableRows)
@@ -74,7 +76,7 @@ public void SetTimetableRows(TimetableRow[]? timetableRows)
 		logger.Trace("Setting TimetableRows...");
 
 		IsEnabled = false;
-		LonLatLocationService.StaLocationInfo = timetableRows?.Select(v => new StaLocationInfo(v.Location.Location_m, v.Location.Longitude_deg, v.Location.Latitude_deg, v.Location.OnStationDetectRadius_m)).ToArray();
+		LonLatLocationService.StaLocationInfo = timetableRows?.Where(v => !v.IsInfoRow).Select(v => new StaLocationInfo(v.Location.Location_m, v.Location.Longitude_deg, v.Location.Latitude_deg, v.Location.OnStationDetectRadius_m)).ToArray();
 	}
 
 	static EasterEggPageViewModel EasterEggPageViewModel { get; } = InstanceManager.EasterEggPageViewModel;
@@ -217,6 +219,10 @@ async Task PositioningTask()
 				{
 					double distance = LonLatLocationService.SetCurrentLocation(loc.Longitude, loc.Latitude);
 					LogView.Add($"lonlat: ({loc.Longitude}, {loc.Latitude}), distance: {distance}m");
+					if (double.IsNaN(distance))
+					{
+						IsEnabled = false;
+					}
 				}
 				logger.Trace("Location Service Positioning Success (lon: {0}, lat: {1})", loc.Longitude, loc.Latitude);
 			}