diff --git a/selfdrive/controls/controlsd.py b/selfdrive/controls/controlsd.py
index eebb443..8a79cfc 100644
--- a/selfdrive/controls/controlsd.py
+++ b/selfdrive/controls/controlsd.py
@@ -293,9 +293,15 @@ class Controls:
         self.events.add(EventName.laneChangeBlocked)
       else:
         if direction == LaneChangeDirection.left:
-          self.events.add(EventName.preLaneChangeLeft)
+          if self.sm['frogpilotPlan'].laneWidthLeft >= self.frogpilot_toggles.lane_detection_width:
+            self.events.add(EventName.preLaneChangeLeft)
+          else:
+            self.events.add(EventName.noLaneAvailable)
         else:
-          self.events.add(EventName.preLaneChangeRight)
+          if self.sm['frogpilotPlan'].laneWidthRight >= self.frogpilot_toggles.lane_detection_width:
+            self.events.add(EventName.preLaneChangeRight)
+          else:
+            self.events.add(EventName.noLaneAvailable)
     elif self.sm['modelV2'].meta.laneChangeState in (LaneChangeState.laneChangeStarting,
                                                     LaneChangeState.laneChangeFinishing):
       self.events.add(EventName.laneChange)
diff --git a/selfdrive/controls/lib/desire_helper.py b/selfdrive/controls/lib/desire_helper.py
index 5ac1731..db91dbd 100644
--- a/selfdrive/controls/lib/desire_helper.py
+++ b/selfdrive/controls/lib/desire_helper.py
@@ -47,6 +47,12 @@ class DesireHelper:
     one_blinker = carstate.leftBlinker != carstate.rightBlinker
     below_lane_change_speed = v_ego < frogpilot_toggles.minimum_lane_change_speed
 
+    if not (frogpilot_toggles.lane_detection and one_blinker) or below_lane_change_speed:
+      lane_available = True
+    else:
+      desired_lane = frogpilotPlan.laneWidthLeft if carstate.leftBlinker else frogpilotPlan.laneWidthRight
+      lane_available = desired_lane >= frogpilot_toggles.lane_detection_width
+
     if not lateral_active or self.lane_change_timer > LANE_CHANGE_TIME_MAX:
       self.lane_change_state = LaneChangeState.off
       self.lane_change_direction = LaneChangeDirection.none
@@ -78,7 +84,7 @@ class DesireHelper:
         if not one_blinker or below_lane_change_speed:
           self.lane_change_state = LaneChangeState.off
           self.lane_change_direction = LaneChangeDirection.none
-        elif torque_applied and not blindspot_detected and self.lane_change_wait_timer >= frogpilot_toggles.lane_change_delay:
+        elif torque_applied and not blindspot_detected and lane_available and self.lane_change_wait_timer >= frogpilot_toggles.lane_change_delay:
           self.lane_change_state = LaneChangeState.laneChangeStarting
           self.lane_change_wait_timer = 0
 
diff --git a/selfdrive/controls/lib/events.py b/selfdrive/controls/lib/events.py
index 747d799..64a9697 100755
--- a/selfdrive/controls/lib/events.py
+++ b/selfdrive/controls/lib/events.py
@@ -336,6 +336,16 @@ def joystick_alert(CP: car.CarParams, CS: car.CarState, sm: messaging.SubMaster,
   return NormalPermanentAlert("Joystick Mode", vals)
 
 
+# FrogPilot Alerts
+def no_lane_available_alert(CP: car.CarParams, CS: car.CarState, sm: messaging.SubMaster, metric: bool, soft_disable_time: int) -> Alert:
+  lane_width = sm['frogpilotPlan'].laneWidthLeft if CS.leftBlinker else sm['frogpilotPlan'].laneWidthRight
+  lane_width_msg = f"{lane_width:.1f} meters" if metric else f"{lane_width * CV.METER_TO_FOOT:.1f} feet"
+
+  return Alert(
+    "No lane available",
+    f"Detected lane width is only {lane_width_msg}",
+    AlertStatus.normal, AlertSize.mid,
+    Priority.LOWEST, VisualAlert.none, AudibleAlert.none, .2)
 
 EVENTS: dict[int, dict[str, Alert | AlertCallbackType]] = {
   # ********** events with no alerts **********
@@ -965,6 +975,10 @@ EVENTS: dict[int, dict[str, Alert | AlertCallbackType]] = {
     ET.NO_ENTRY: NoEntryAlert("Please don't use the 'Development' branch!"),
   },
 
+  EventName.noLaneAvailable : {
+    ET.PERMANENT: no_lane_available_alert,
+  },
+
   EventName.openpilotCrashed: {
     ET.PERMANENT: Alert(
       "openpilot crashed",
diff --git a/selfdrive/frogpilot/controls/frogpilot_planner.py b/selfdrive/frogpilot/controls/frogpilot_planner.py
index f4f6bc8..c3c5373 100644
--- a/selfdrive/frogpilot/controls/frogpilot_planner.py
+++ b/selfdrive/frogpilot/controls/frogpilot_planner.py
@@ -44,6 +44,14 @@ class FrogPilotPlanner:
 
     lead_distance = self.lead_one.dRel
 
+    check_lane_width = frogpilot_toggles.lane_detection
+    if check_lane_width and v_ego >= frogpilot_toggles.minimum_lane_change_speed:
+      self.lane_width_left = float(calculate_lane_width(modelData.laneLines[0], modelData.laneLines[1], modelData.roadEdges[0]))
+      self.lane_width_right = float(calculate_lane_width(modelData.laneLines[3], modelData.laneLines[2], modelData.roadEdges[1]))
+    else:
+      self.lane_width_left = 0
+      self.lane_width_right = 0
+
     self.base_acceleration_jerk, self.base_speed_jerk = get_jerk_factor(frogpilot_toggles.custom_personalities,
                                                                         frogpilot_toggles.aggressive_jerk_acceleration, frogpilot_toggles.aggressive_jerk_speed,
                                                                         frogpilot_toggles.standard_jerk_acceleration, frogpilot_toggles.standard_jerk_speed,