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<h2>Vehicle Parking Assist Systems Explained</h2>by JasonLancasterAlmost every kind of vehicle has experienced a growth in size over the past decade. An "entry-level" car by a company such as BMW nowadays might be near the size and weight of a mid-size car ten years ago. As vehicles have gotten bigger, parking has become harder and harder. The most obvious vehicle size increase has been in the pickup truck segment, where "small" trucks like the Dodge Dakota now look like giants beside their early predecessors. Full-size trucks have also been expanding, becoming heavier, wider and taller. Toyota too has participated in this growth trend. The Toyota Tundra was originally a mid-size pickup marketed to full-size buyers. Toyota realized a larger vehicle could fit more customers, and as a result, the 2007 Tundra was much bigger than earlier models in almost every dimension. The downside of bigger vehicles is that parking is now a lot harder than it was before. When driving a new Toyota Tundra, you may notice it's difficult to tell where the truck begins and ends. As a solution to these new parking woes, vehicle designers have developed a new tool for drivers called "parking assist." "Parking assist" is, on most vehicles, a system of sensors mounted on one or both sets of bumpers which beeps as the vehicle approaches an object. The beeps usually begin from about 6 feet away from an obstacle, and increase in frequency as you approach, becoming a continuous tone at about 6 inches from the obstacle. Beeping frequency and onset vary between different systems. The parking assist is a great tool for parallel parking, and can also serve as a warning if a small object such as a fence post or child is near your vehicle. But how does it work? Basically, a set of eyes are mounted in the vehicle's bumpers. These "eyes", or special sensors, transmit highly focused sound waves at regular intervals from the bumper. When these sound waves come into contact with a solid object, they reflect back towards the sensor. Since the speed of sound is fairly constant through air, a computer uses the time it took for the reflection to be returned in order to calculate the distance between the bumper and the object. This is exactly the same principle employed by submarines using active sonar underwater, except that water transmits the sound waves much better than air, allowing for better range. While the system is effective when dealing with stationary objects like parked vehicles, posts and garage doors, the sensors are not quite sensitive enough to pick up smaller objects moving past the sensors. This means that small children, animals, or all-terrain vehicles might not generate a warning beep - or at least not a consistent warning beep. So, while parking assist - aka parking sonar - is definitely a useful tool, it is not a replacement for caution. Drivers must still do their best to ensure that there is no one behind or in front of their vehicle when parking. Some high-end luxury cars are beginning to feature the next generation of parking assist systems, which are amazing devices. A video camera and complex computer program are used to enhance the accuracy of traditional sound sensors. Instead of simply emitting warnings when the driver is close to an object, the newer parking assist systems can actually steer and park the car for you. This is an amazing tool for parallel parking - as long as you're ready to give your car control of the steering, gas and brake. Whatever will they dream up next?<h3>About the Author</h3>The author Jason Lancaster is the editor of TundraHeadquarters.com, a website with information, news, and reviews of <a href="http://www.tundraheadquarters.com/blog/popular-toyota-tundra-accessories/">Toyota Tundra accessories</a> and <a href="http://www.tundraheadquarters.com/blog/popular-toyota-tundra-accessories/">Tundra parts</a>. Article Source <a href="http://www.free-article-submit.com">Free Article Submit</a>