diff --git a/app/src/main/java/it/reyboz/bustorino/data/GtfsMaintenanceWorker.kt b/app/src/main/java/it/reyboz/bustorino/data/GtfsMaintenanceWorker.kt
new file mode 100644
--- /dev/null
+++ b/app/src/main/java/it/reyboz/bustorino/data/GtfsMaintenanceWorker.kt
@@ -0,0 +1,70 @@
+package it.reyboz.bustorino.data
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.Context
+import android.os.Build
+import android.widget.Toast
+import androidx.core.app.NotificationCompat
+import androidx.work.*
+import it.reyboz.bustorino.R
+import it.reyboz.bustorino.backend.Notifications
+
+class GtfsMaintenanceWorker(appContext: Context, workerParams: WorkerParameters)
+    : CoroutineWorker(appContext, workerParams)  {
+    override suspend fun doWork(): Result {
+        val data = inputData.getString(OPERATION_TYPE)
+        if(data ==null){
+            return Result.failure()
+        }
+        val result = when (data){
+            CLEAR_GTFS_TRIPS ->clearGtfsTrips()
+            else -> {Result.failure()}
+        }
+        return result
+    }
+    private fun clearGtfsTrips(): Result{
+        val gtfsRepository = GtfsRepository(applicationContext)
+        gtfsRepository.gtfsDao.deleteAllTrips()
+
+        return Result.success()
+    }
+    override suspend fun getForegroundInfo(): ForegroundInfo {
+        val notificationManager =
+            applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        val context = applicationContext
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val channel = NotificationChannel(
+                Notifications.DB_UPDATE_CHANNELS_ID,
+                context.getString(R.string.database_notification_channel),
+                NotificationManager.IMPORTANCE_MIN
+            )
+            notificationManager.createNotificationChannel(channel)
+        }
+
+        val notification = NotificationCompat.Builder(context, Notifications.DB_UPDATE_CHANNELS_ID)
+            //.setContentIntent(PendingIntent.getActivity(context, 0, Intent(context, MainActivity::class.java), Constants.PENDING_INTENT_FLAG_IMMUTABLE))
+            .setSmallIcon(R.drawable.bus)
+            .setOngoing(true)
+            .setAutoCancel(true)
+            .setOnlyAlertOnce(true)
+            .setPriority(NotificationCompat.PRIORITY_MIN)
+            .setContentTitle(context.getString(R.string.app_name))
+            .setLocalOnly(true)
+            .setVisibility(NotificationCompat.VISIBILITY_SECRET)
+            .setContentText("Database maintenance")
+            .build()
+        return ForegroundInfo(3671672811121.toInt(), notification)
+    }
+    companion object{
+        const val CLEAR_GTFS_TRIPS="trips_clear"
+        const val OPERATION_TYPE="oper_type"
+        fun makeOneTimeRequest(type: String): OneTimeWorkRequest {
+            val data = Data.Builder().putString(OPERATION_TYPE, type).build()
+            return OneTimeWorkRequest.Builder(GtfsMaintenanceWorker::class.java)
+                .setInputData(data).setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+                .addTag(type)
+                .build()
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/it/reyboz/bustorino/data/gtfs/Converters.kt b/app/src/main/java/it/reyboz/bustorino/data/gtfs/Converters.kt
--- a/app/src/main/java/it/reyboz/bustorino/data/gtfs/Converters.kt
+++ b/app/src/main/java/it/reyboz/bustorino/data/gtfs/Converters.kt
@@ -91,13 +91,5 @@
         }
             return WheelchairAccess.UNKNOWN
         }
-        @TypeConverter
-        fun wheelchairToInt(access: WheelchairAccess): Int{
-           return  access.value;
-        }
-        @TypeConverter
-        fun wheelchairFromInt(value: Int): WheelchairAccess {
-            return  WheelchairAccess.getByValue(value)?: WheelchairAccess.UNKNOWN
-        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/it/reyboz/bustorino/data/gtfs/WheelchairAccess.kt b/app/src/main/java/it/reyboz/bustorino/data/gtfs/WheelchairAccess.kt
--- a/app/src/main/java/it/reyboz/bustorino/data/gtfs/WheelchairAccess.kt
+++ b/app/src/main/java/it/reyboz/bustorino/data/gtfs/WheelchairAccess.kt
@@ -5,8 +5,10 @@
     SOMETIMES(1),
     IMPOSSIBLE(2);
 
+    // BE CAREFUL: WheelchairAccess is saved as a String in the DB due to a catastrophic error.
+    // However, everything works perfectly, so... finchè la barca va...
     companion object {
         private val VALUES = values()
         fun getByValue(value: Int) = VALUES.firstOrNull { it.value == value }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/MapViewModel.kt b/app/src/main/java/it/reyboz/bustorino/fragments/MapViewModel.kt
--- a/app/src/main/java/it/reyboz/bustorino/fragments/MapViewModel.kt
+++ b/app/src/main/java/it/reyboz/bustorino/fragments/MapViewModel.kt
@@ -214,7 +214,9 @@
         val runNewWork = if(info.isEmpty()){
             true
         } else info[0].state!=WorkInfo.State.RUNNING && info[0].state!=WorkInfo.State.ENQUEUED
-        Log.d(DEBUG_TI, "Request to download and insert ${trips.size} trips, proceed: $runNewWork")
+        val addDat = if(info.isEmpty())
+            null else  info[0].state
+        Log.d(DEBUG_TI, "Request to download and insert ${trips.size} trips, proceed: $runNewWork, workstate: $addDat")
         if(runNewWork) {
             val tripsArr = trips.toTypedArray()
             val data = Data.Builder().putStringArray(MatoDownloadTripsWorker.TRIPS_KEYS, tripsArr).build()
diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/SettingsFragment.java b/app/src/main/java/it/reyboz/bustorino/fragments/SettingsFragment.java
--- a/app/src/main/java/it/reyboz/bustorino/fragments/SettingsFragment.java
+++ b/app/src/main/java/it/reyboz/bustorino/fragments/SettingsFragment.java
@@ -28,13 +28,21 @@
 import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.lifecycle.Observer;
 import androidx.preference.*;
-import androidx.room.Database;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.OutOfQuotaPolicy;
+import androidx.work.WorkInfo;
+import androidx.work.WorkManager;
 import it.reyboz.bustorino.R;
 import it.reyboz.bustorino.data.DatabaseUpdate;
+import it.reyboz.bustorino.data.GtfsMaintenanceWorker;
+import it.reyboz.bustorino.data.MatoDownloadTripsWorker;
+import org.jetbrains.annotations.NotNull;
 
 import java.lang.ref.WeakReference;
 import java.util.HashSet;
+import java.util.List;
 
 public class SettingsFragment extends PreferenceFragmentCompat implements SharedPreferences.OnSharedPreferenceChangeListener {
     private static final String TAG = SettingsFragment.class.getName();
@@ -95,9 +103,34 @@
                     }
                 }
         );
+
         else {
             Log.e("BusTO-Preferences", "Cannot find db update preference");
         }
+        Preference clearGtfsTrips = findPreference("pref_clear_gtfs_trips");
+        if (clearGtfsTrips != null) {
+            clearGtfsTrips.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+                @Override
+                public boolean onPreferenceClick(@NonNull @NotNull Preference preference) {
+                    if (getContext() != null) {
+                        OneTimeWorkRequest requ = GtfsMaintenanceWorker.Companion.makeOneTimeRequest(GtfsMaintenanceWorker.CLEAR_GTFS_TRIPS);
+                        WorkManager.getInstance(getContext()).enqueue(requ);
+                        WorkManager.getInstance(getContext()).getWorkInfosByTagLiveData(GtfsMaintenanceWorker.CLEAR_GTFS_TRIPS).observe(getViewLifecycleOwner(),
+                                (Observer<List<WorkInfo>>) workInfos -> {
+                                    if(workInfos.isEmpty())
+                                        return;
+                                    if(workInfos.get(0).getState()==(WorkInfo.State.SUCCEEDED)){
+                                        Toast.makeText(
+                                                getContext(), R.string.all_trips_removed, Toast.LENGTH_SHORT
+                                        ).show();
+                                    }
+                                });
+                        return true;
+                    }
+                    return false;
+                }
+            });
+        }
 
     }
 
diff --git a/app/src/main/res/layout/fragment_test_realtime_gtfs.xml b/app/src/main/res/layout/fragment_test_realtime_gtfs.xml
--- a/app/src/main/res/layout/fragment_test_realtime_gtfs.xml
+++ b/app/src/main/res/layout/fragment_test_realtime_gtfs.xml
@@ -10,7 +10,7 @@
             android:id="@+id/gtfsMessageTextView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/hello_blank_fragment"
+            android:text="BABLABLA"
             app:layout_constraintTop_toBottomOf="@id/btn_download_data"
             app:layout_constraintEnd_toEndOf="parent"
             android:layout_margin="20dp" app:layout_constraintStart_toStartOf="parent"/>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -205,4 +205,8 @@
 
     <!-- lines -->
     <string name="long_press_stop_4_options">Tocca a lungo la fermata per le opzioni</string>
+    <string name="remove_all_trips">Rimuovi tutti i trip GTFS</string>
+    <string name="all_trips_removed">Tutti i trip GTFS sono rimossi dal database</string>
+
+
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -237,7 +237,7 @@
         <item>@string/nav_map_text</item>
         <item>@string/lines</item>
     </array>
-    <!-- TODO: Remove or change this placeholder text -->
-    <string name="hello_blank_fragment">Hello blank fragment</string>
 
+    <string name="remove_all_trips">Remove all GTFS trips info</string>
+    <string name="all_trips_removed">All GTFS trips have been removed from the database</string>
 </resources>
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -87,6 +87,10 @@
                 android:summary="@string/database_update_req_descr"
                 android:key="pref_db_update_now"
             />
+        <androidx.preference.Preference
+                android:title="@string/remove_all_trips"
+                android:key="pref_clear_gtfs_trips"
+            />
     </androidx.preference.PreferenceCategory>
 
     <androidx.preference.PreferenceCategory