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How does a laser speed gun work to measure a car's speed?
How does a laser speed gun work to measure a car's speed? How is it different from a radar gun?
SAFETY & REGULATORY DEVICES
In the Safety & Regulatory Devices section you'll find tools and technology intended to keep drivers and passengers safe, from car seats and airbags to red-light camera technology.
Be Your Own Mechanic
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How Electronic Throttle Control Systems WorkIt used to be easy to make your car go faster -- just step on the accelerator, and the throttle would manually open. Today, many cars use electronic throttle control. What does it take for sensors and computers to control a car's speed? See more »
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How Head-up Displays Work
Head-up displays are much more than just a novelty or a new way of viewing navigation directions. In fact, HUDs could very well be one of the best safety systems your car has ever seen. See more »
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How Hill-Start Control Works
Your car or truck could be equipped with hill-start control and you probably wouldn't even know it was there. But don't underestimate the importance of this system that operates in the background. See more »
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How Occupant Classification Systems Work
Airbags have saved more than 27,000 lives since 1990, yet they still have detractors because of their danger to children. Occupant Classification Systems detect exactly who -- or what -- is sitting in your passenger seat. See more »
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How Odometers Work
Mechanical odometers have been counting the miles for centuries. Although they are a dying breed, they are incredibly cool inside. Learn how this simple device tracks distance and find out about digital odometers. See more »
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How Pre-Collision Systems Work
A pre-collision detection system sounds like something out of a science fiction film; however, these systems have actually been around for several years. So, what kinds of systems are available today? See more »
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How Red-light Cameras Work
The light turns red. You're alone at the intersection. There's not another car in sight. Do you run it? Read this before you answer. See more »
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How Seatbelts Work
Seatbelts save thousands of lives each year. How can a piece of fabric end up being the difference between life and death? What does a seatbelt actually do? Learn how seatbelts react in a crash. See more »
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How Self-parking Cars Work
With parking space limited in big cities, squeezing your car into a tiny space is a vital skill. Learn how self-parking cars can remove the difficulty stress and uncertainty of this chore. See more »
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How Side Curtain Airbags Work
In the next few years, side curtain airbags will be a key safety feature in most new cars. How do they complement traditional airbags to keep you safe on the road? See more »
