Adas detection systems — Iowa Permit Test

Bicycle, pedestrian, and obstacle detection alerts you at low speeds, generally around 25 mph.

These sensors are built for slow, close-up driving like city streets, not for spotting things far down the highway.

Alerts you when a bicycle, pedestrian, slow-moving or stationary obstacle has been detected when driving at low speeds, generally around 25 mph.

With detection systems, the beeps get faster as you get closer, and a crash is imminent when the beeps become continuous.

A steady beep means there is no time left to think. Brake right away.

A crash is imminent when the beeps become continuous.

Do not depend on detection systems; stay aware and check for bicyclists, pedestrians, and obstacles yourself, especially in urban areas.

Some systems only see things straight ahead, so a person stepping out from the side can be missed.

Always remain aware of your surroundings and check for bicyclists, pedestrians, or obstacles regularly, especially in urban areas.

Sensors need to be kept clean to work properly.

Mud, snow, or ice over a sensor can blind it, and then it gives no warning at all.

Sensors need to be kept clean in order for them to function properly.

A curve speed warning tracks your speed and location by GPS and warns you to slow down when approaching curves and exits.

Taking a curve too fast can push the car off the road. The warning tells you to slow before you get there.

Tracks the vehicle’s speed and location via GPS and warns you to slow down when approaching curves and exits.

At about what speed does bicycle, pedestrian, and obstacle detection generally work?

25 mph. These sensors are built for slow, close-up driving like city streets, not for spotting things far down the highway. Iowa Driver's License Manual, p.29: “Alerts you when a bicycle, pedestrian, slow-moving or stationary obstacle has been detected when driving at low speeds, generally around 25 mph.”