Warning systems: backing, blind spots, and cameras
A 3-minute lesson from the Iowa course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Vehicle warning systems alert you—by sound, light, or vibration—that a crash is about to happen or something is wrong. Most are passive: they warn you but don't prevent the crash, so you still have to act.
Passive technology
Warns the driver of a potential issue but does not automatically prevent a problem or crash; the driver may need to change what they're doing.
Rear sensors scan behind the vehicle when you shift into reverse and alert you by sound, vibration, or both if an object or car is directly behind you.
Shows a wide view behind the vehicle when you shift into reverse. The screen may be on the center console, in the rearview mirror, in the sun visor, or elsewhere.
Shows a video view of the lane beside you when you signal or press a button (often on the signal lever). It may not work while backing or may only work at low speeds.
Use sideview cameras and surround-view systems together with traditional mirrors and head checks. Some newer vehicles have them in place of traditional mirrors.
Your blind spot light is dark as you signal for a lane change. Still check your mirrors and turn your head—the monitor can miss things, and you're the one responsible.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
Your car has a blind spot monitor. Before changing lanes, what should you still do?
Rely on the monitor's light alone
Signal and wait for the monitor to beep
Check mirrors and look over your shoulder
Watch the dashboard display only
Answer: Check mirrors and look over your shoulder
Don't depend on blind spot monitors alone; keep scanning side mirrors, the rear-view mirror, and over your shoulders.