How to Choose a Blind Spot & Backup Warning System

Know how the device mounts on your vehicle.

Camera and sensor systems that are mounted on the vehicle’s bumper or bodywork may necessitate drilling. They may not be the best choice if you lease your vehicle.

If you have a hitch, you can consider a model that mounts in the trailer-hitch receiver. But you would have to remove the system to use your hitch.

Other camera and sensor models mount on the license-plate frame. But some states prohibit frames because they can obscure the plate.

Within types, features vary. This is especially true with the sensor models we tested. The ultrasonic systems were generally the most sensitive, but their performance was adversely affected by rain, snow, or other inclement weather.

The microwave-based sensor systems we tested were not affected by weather but are less sensitive as a group. They also don’t warn the driver unless the vehicle or object behind it is moving.

The display quality of the camera-based models is very good, although it doesn’t match that of the larger screens on some carmakers’ systems. Most of the system displays turn on when the vehicle shifts into reverse, but one, the Audiovox, must be turned off and on manually.

More than 2,400 children are accidentally backed-up over each year in the U.S.

And of those, more than 100 die. With the proliferation of SUVs and mini-vans, drivers aren't aware of the enormous rear view blind spots that prevent them from seeing what's behind them, especially small objects, animals, people, and children. Some of these blind spots are even greater than the length of an average driveway! Senators Hillary Clinton (D-New York) and John Sununu (R-New Hampshire) have recently proposed legislation requiring the U.S. Department of Transportation to issue regulations aimed at reducing accidents that frequently kill or injure children in cars. But until that legislation is passed, it's up to the driver to protect their loved-ones and prevent a tragedy by using a Park Assist system or a backup camera.

In fact, the Centers for Disease Control and Prevention estimated 2,767 people were treated in emergency rooms from July 2000 through June 2001 because of backovers. "This is a huge problem," Fennell said. "A lot of [the problem] is due to the change in our vehicle mix" that has more people driving tall-profile vehicles, she said.

Indeed, Fennell's research indicates that "in 60 percent of the [backover] cases, it's a truck, van or SUV that's involved," Fennell said. The reduced rearward visibility is caused by the design and tall profile of SUVs, pickup trucks and even vans.

The top edge of the tailgates and liftgates in these vehicles typically sits high and so do the vehicles themselves. This means that unaware children and small-stature adults and anything not tall enough to be visible in the rear window glass might be run over as the vehicle is backing up.

Consumers can choose from a wider range of aftermarket vehicle-backup systems since our last report, including new and improved designs.

All such systems are intended to help drivers detect objects within the blind spot behind the vehicle.

New are camera systems such as the Audiovox and ParkFX we tested that offer a “picture in the mirror” feature. The display is on a mirror that fits on top of or replaces the existing rear-view mirror, so you don’t have to choose between looking at the display and at the rear-view mirror while backing up. ParkFX also combines a camera with an audible sensor, so you can see and hear potential trouble. We would like to see more backup warning systems on the market that combine camera and sensor technologies.

Backup systems are typically marketed as parking aids, not safety equipment. But our tests show that the camera models can also help drivers avoid backover-accident injuries and fatalities.

Top 5 Auto Safety Technologies

Which of the often-expensive new technology might really save your life? Cars and trucks have become a lot safer in the past decade, but some 43,000 people still die every year on U.S. highways. To be sure you and your family do not wind up among these statistics, you want the latest and best auto safety equipment available when you buy a new car. But unless you can afford a luxury car--where most safety gear will be standard--you will have to make choices about how much to spend on optional auto safety equipment.

Some state-of-the-art auto safety devices--such as blind spot detection systems --aim to help you survive once an accident happens. Others--even better--help to control skids and other dangerous situations, aiming to avoid accidents entirely. To stay safe, you ideally need both preventive and protective equipment. New auto safety gear may be especially important if you are thinking about buying a sport utility vehicle (SUV).

J.D. Power & Associates' Consumer Ratings of Top 5 Auto Safety Technologies:

1. Tire-pressure monitoring
2. LaneFX style blind-spot detection / side assist / collision warning
3. Lane-departure warning
4. Emergency brake assist/collision mitigation
5. Rearview backup camera
   

Automakers are Designing New Car Gadgets Focused on Driver Safety and Awareness

Safer Lane Changes is Just One of the Latest Trends to Include Advanced Gadgets in New SUV Models

Every new car season brings with it a dazzling assortment of high-tech gadgets and an equally formidable barrage of hype aimed at romancing you into this year's model.

What's hot and what's hype? We posed that question to Paul Duchene, a national automotive writer based in Portland, Ore.

"There are a lot of gizmos this year and some of them are good, too," he says. "One of the reasons is there are a lot of new models and a whole bunch of updates this year, including the Nissan 350Z, Mazda's RX-8 and BMW's Z4 and 745i, the car some critics have informally dubbed 'the quarter to eight.'"

Let's put the pedal to the metal and cruise some of this year's hottest new gadgets:

Intelligent cruise control: This lends new dimension to the term "keeping up with the Joneses." Previously, cruise control was a simple proposition: You set your speed and your car maintained it until you tapped the brake or manually turned it off. Infiniti's new wrinkle uses a laser beam to measure the distance between you and the vehicle ahead and maintains a preset distance until you disengage it. The upside is you can't tailgate. The downside depends on the driving skills of the guy in front of you.

Directional stability: This is a little like having your mother-in-law in the back seat, only quieter. "You go into a corner too hard and the car basically figures out that it's about to change direction from where you want it to go and will selectively apply, say, a rear brake on one side just to keep it going in the line that it senses it's pointed," says Duchene. And he tested it. Hard. "It really works, way past the point that it makes sense."

Mouse control: It had to happen and finally does with BMW's 7 series. That dial-shaped gizmo where a stick shift would normally reside is called iDrive and it controls the heat, air, audio level and other cabin-related functions. This gives you a sleek, button-free dashboard. Beginners, however, need to look at the in-dash display to use it.

Voice-recognition system: Sure, we all talk, even scream, at our cars on occasion. Now Infiniti presents one that finally listens. The Q45 voice recognition system allows you to change CDs, adjust the temperature, access your GPS navigation system or make a hands-free cell phone call, all through voice command. The system understands 50,000 words in 150 dialects and even learns the sound of your voice. Hal, is that you?

Run-flat tires: No matter how high-tech your ride, there are four things all cars have in common, and they still go flat from time to time. Run-flat tires don't prevent flats, but they will get you to a repair shop. "When you run over a nail and the tire goes flat, if you keep it under 30 miles per hour, it will get you someplace where you can change it," Duchene explains. "Part of the reason they can do it is that performance tires are much lower profile and deform much less, so you can make stiffer sidewalls."

Mobile entertainment: New minivans approximate all the comforts of home: Pop-down DVD screens, earphone ports, even a remote control to fight over. That takes care of the kids; now what about Mom and Dad? How about coast-to-coast, commercial-free satellite radio? For the cost of a radio receiver ($300 and up) and service (less than $15 a month), you can receive 70 channels of commercial-free music and 40 channels of news, talk, sports and entertainment programming from such providers as XM and Sirius. It sure beats choruses of, "Are we there yet?"

Limp-home mode: How smart is the Cadillac Northstar engine? If you blow a radiator hose, the Northstar automatically reverts to limp-home mode, shutting the gas supply off in several cylinders and turning the engine into a quasi-air cool system. You won't set any land speed records, but your engine will survive the damage you unwittingly might have done to it.

DVD navigation: Because of the limited data storage capacity of earlier onboard GPS satellite-navigation systems, you had to reinstall a different CD of map displays if you wanted to travel to other parts of the country. With the new DVD-based systems, all of North America is now your oyster. Does it play movies, too? Duchene chuckles: "The Lexus system has the ability to play movie DVDs on its screen, but it won't play if you're in gear, so you can't be watching a movie while you're driving down the road." We really didn't think so, but had to ask.

Automatic braking: Remember your mother-in-law in the back seat? Here's a feature that cleverly simulates the effect of her panicked stranglehold on you in a traffic crisis. "There are brake systems now that have a brains-override thing where they figure you're not braking hard enough for what's going on and will actually add power to the brakes," Duchene says. Easier on the esophagus, too.

Head restraint, side curtains and pre-tensioners: Luxury cars feature all the safety money can buy. In addition to standard forward and side airbags, many models now come with inflatable head-restraint bands along the top of the windshield and inflatable side window curtains. The Lexus system automatically cinches up your seat belt with pre-tensioners just milliseconds before impact. Cadillac's Escalade SUV uses sensors to analyze the size and weight of front-seat passengers and automatically deactivates the front air bag if it detects a child or rear-facing child seat riding shotgun. "Though not yet on the market, the car companies are developing a 'catcher's mitt' seat that, if things go wrong, just kind of grabs you and holds you in place," says Duchene.

Back-up assistance: If parallel parking is not your strong suit, you'll be pleased to hear about a couple systems designed to give you a better look at your rear end. GM's Ultrasonic Rear Parking Assistant uses four sensors to triangulate the position of objects behind you and guides you with both an audible chime and LED lights at the back window. Infiniti's RearView Monitor goes one step further and actually displays on the dashboard monitor a full-color video from a rear-mounted mini-cam. Now all you've got to do is find a parking space.

Automatic accident reporting: In the event of an accident, your car can now phone for help, even if you can't. "Some of this stuff now, if you have a crash, the car calls home and 911 and says, 'I've been hurt,'" Duchene says. "But that has its drawbacks. As one of my friends pointed out, sometimes when you make a mistake, you could use about 20 minutes to get away."