How radar and cameras help cruise control track traffic ahead
Adaptive cruise control uses sensors and software to adjust a car’s speed and keep a set distance from traffic ahead. It has developed from a radar-based feature into a more capable system, but its limits matter because drivers can mistake it for a self-driving or collision-avoidance system.
Radar measures the distance and closing speed of vehicles, while a windscreen camera helps identify lane markings and the car to follow. Newer features use maps, driving-style learning and road data to anticipate bends, queues or speed-limit changes; Bosch radar range grew from about 250 metres in 2014 to 530 metres for its successor. Manufacturers still warn that performance can be reduced by heavy rain, fog, snow, sharp bends and dense traffic, and the system may not detect stationary vehicles, people or animals.
- Radar and cameras track traffic ahead.
- Software can adapt to bends, queues and driving styles.
- Adaptive cruise control has important limits and is not collision avoidance.
New here? Start with this
Adaptive cruise control is a system that automatically adjusts your car's speed to maintain a safe distance from the vehicle ahead of you. The technology matters because many drivers misunderstand what it can do, sometimes mistaking it for a self-driving system or collision-avoidance feature when it is neither.
The system relies on radar, which measures how far away other vehicles are and how quickly they are approaching, and a windscreen camera that identifies lane markings and tracks which car to follow. Modern versions have become more sophisticated, with added features like maps and learning algorithms that help the car anticipate sharp bends, traffic queues or speed-limit changes ahead.
However, the technology has real limits that drivers should know about. Radar can struggle in heavy rain, fog or snow, and the system may fail to detect stationary vehicles, people or animals in its path. Manufacturers continue to warn that performance can be significantly reduced by these conditions and by dense traffic or sharp bends.
Read the full article at the source →
Originally published by Engadget as “The tech behind your car’s adaptive cruise control”.