Feature · 3 min read
Blind Spot Monitoring Explained
Warns you when a vehicle is hiding in your blind spot during lane changes.
What is Blind Spot Monitoring?
Blind Spot Monitoring (BSM) uses sensors to watch the area beside and slightly behind your car that you can't easily see in your mirrors. If another vehicle is hiding there, a small light usually appears in or near your wing mirror.
How does it work?
Short-range radar sensors are built into each rear corner of the car. They constantly scan the lanes either side of you. When a vehicle enters your blind spot, the system lights an indicator in the mirror. If you then signal to change lane, many systems add a louder warning beep or vibration.
What does it feel like?
On a motorway you glance at your mirror to change lane and see a small amber light glowing on the mirror glass. That's the system telling you: 'Don't move over yet — someone is there.'
Benefits
- ✓Reduces the risk of side-swipe collisions
- ✓Especially useful on busy motorways
- ✓Helpful for drivers with limited neck mobility
- ✓Works in the dark and in poor light
Limitations
Heavy rain, snow or a layer of road grime over the rear bumper can stop the radar working properly. The system supplements your mirrors and shoulder checks — it doesn't replace them.