Notes

Safety Sensors for Your Car
Safety sensors monitor and control the proximity of people and equipment. They help reduce risk without limiting performance or reducing productivity.

Depending on the model you choose, safety systems can perform different functions. These include: junction-turning assist – an intersection scanner that reads vehicles pulling out of a turn and sounds a warning; or lane-centering assist, which uses a forward-pointed camera to keep the vehicle centered in its lane.
Blind Spot Detection

Blind spot monitoring uses sensors around your car's side mirrors to alert you if there's another vehicle in a lane that you can't see. It's a simple but effective safety feature that can prevent you from changing lanes into another car or getting stuck behind a truck while driving on the highway.

Most blind-spot systems warn you through a visual cue, like a warning light in your car's wing mirror, and audible chime. Lone Worker Alarms Ford's version of this technology, which it calls BLIS, is more advanced, using multiple radars and a camera to track vehicles.

It can even anticipate when a car is going to move into your blind spot if you activate your turn signal, and some systems will beep to let you know it's not safe to change lanes. You can find these systems in a variety of cars, and they're also available as part of an add-on package on some trucks. For industrial applications, try a set of Steute Ex safety sensors, which are ATEX and CSA approved for use in corrosive environments or hygienic spaces.
Lane Departure Warning

Known as Lane Departure Warning in the automotive industry and often bundled into larger Advanced Driver Assistance Systems (ADAS) tech packages, lane departure warning is one of the most common of all safety sensors. This system uses cameras to monitor the lane marker lines, and if your car crosses them with your turn signal off, it will warn you with a visual and audible alert. Some systems also have a steering assist feature that can nudge the wheel to help keep your car centered within its lane.

This system works best when the lane markings are visible and have clearly defined edges, so it won’t work on roads with temporary lane markings like roadwork zones. Also, as with all machine vision systems, there will be false positives—your vehicle may say you are leaving your lane when you actually aren’t.

Most manufacturers offer this technology, and it is available on many new cars. If you are considering a new vehicle, check whether it has this feature and make sure that the alerts can be disabled or reduced in volume.
Lane Keeping Assist

Many cars offer lane-keeping assist, or LKA. These systems can be a big help on narrow roads and motorways, though they're most effective at higher speeds. Like lane departure warning, these systems are activated by a button on the steering wheel or instrument panel, or via a visual cue (an image of a car between two parallel lines). Once engaged, most lane-keeping assist systems will warn you when you move too close to a painted lane marking and gently nudge your vehicle back into the center of the lane.

Some systems will also display a white or amber LANE KEEP ASSIST icon on the dashboard and trigger three seat pulses or beeps (depending on your car's safety system). If you continue to drift out of your lane, an additional audible alert or vibration through the steering wheel should occur.

Most lane-keeping assists allow you to adjust sensitivity levels and type of warnings, so that the system isn't annoying or intrusive. But keep in mind that these systems still don't come close to fully autonomous driving, and they aren't a substitute for attentive driving.
Lane Change Assist

This feature keeps an eye on the lane markings (center and side stripes) on multi-lane highways or roads to help drivers keep the car in its own lane. Some systems only warn you if the vehicle gets too close to the lines, while others can automatically adjust the steering wheel to return the car to the lane if you're signaling for a change but it's unsafe to do so.

Like a blind spot warning system, this technology is not foolproof and it's still up to you to pay attention to the road at all times. The system may be confused by unusual road layouts, faded or obstructed lane markers or heavy rain or snow on the windshield. It's also possible for systems to become so annoying with their lights, sounds and warnings that you turn them off completely, reducing the safety benefits they're intended to provide. It's worth checking out your owner's manual to find out if your specific model has any limitations on sensor function performance or other important information. Some brands, such as Jeep and those from parent company Stellantis, lump LDW and LKA into a single tech bundle called LaneSense; Seat offers it in its Safety Pack on the Juke small SUV and Leon family cars.
Rear Cross-Traffic Alert

Rear cross-traffic alert is a safety feature that helps the driver avoid back-up accidents when exiting a parking space or driveway. This system uses radar sensors located on the vehicle’s rear corners to monitor the area behind your car and warn the driver if approaching vehicles are detected. The warning can come in the form of an audio signal such as a beep or visual cues like an indicator light.

Rear Cross-Traffic Alert is often paired with a backup camera and activates when your vehicle shifts into reverse gear. It may also be activated by your braking system when the system senses an approaching vehicle in your path.

RCTA is meant to be used as an aid, so it is important that the driver manually checks behind their vehicle before putting it into reverse and to always be aware of surrounding vehicles. It is not designed to work in angled parking spaces and should only be viewed as an extra layer of protection. As with all ADAS features, it is vital that the sensor is properly calibrated to ensure the system works as intended.
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