diff --git a/core/tracking/tracker.py b/core/tracking/tracker.py
index 26b35ee..6fa6ed9 100644
--- a/core/tracking/tracker.py
+++ b/core/tracking/tracker.py
@@ -85,7 +85,7 @@ class VehicleTracker:
             tracking_config: Configuration from pipeline.json tracking section
         """
         self.config = tracking_config or {}
-        self.trigger_classes = self.config.get('triggerClasses', ['front_rear'])
+        self.trigger_classes = self.config.get('trigger_classes', self.config.get('triggerClasses', ['frontal']))
         self.min_confidence = self.config.get('minConfidence', 0.6)
 
         # Tracking state