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.

ParkFX is the 360-Degree Backup Solution and it's Less Costly Than Backup Sensors, Park Assist and Rearview Cameras

Deaths increase. Ninety-one children were killed in 2003 by drivers who didn’t see them while backing up, according to Kids and Cars ( www.kidsandcars.org ), a nonprofit organization working to improve child safety around vehicles. Those deaths represented a 57 percent increase from 2002. During the first six months of 2004, more than 40 deaths have been attributed to backover accidents, many involving vehicles with large blind spots.

Kids and Cars compiles these statistics; the federal government does not track such incidents. Janette Fennell, president of the organization, believes that backover accidents are underreported and that the actual number of children killed or injured is much higher.

Blind spots grow with vehicle size. A likely reason for the increase in injuries is that minivans, pickups, and SUVs account for more than half of all vehicles sold. Many have large rear-view blind spots.

Last year, Consumer Reports began measuring the blind spot of each vehicle we test, checking the distance for short drivers (5 feet 1 inch tall) and for those of average height (5 feet 8 inches tall). The biggest blind spot: 51 feet for a short driver in a Chevrolet Avalanche pickup. But even small sedans can have blind spots of more than 40 feet. We regularly update vehicle blind-spot information, which is available on this site free of charge in The problem of blind spots.

Systems other than ParkFX combine a camera with sensors, so we tested each system independently; it is listed with camera systems in the Ratings.

All the systems we tested are potentially useful. They’re a good complement to looking around the vehicle before entering, and checking the rear window and rear-view mirror just before and while moving in reverse.

Back-over Accidents

Moms Put ParkFX to the Test

Compare Backup Sensors & Cameras to ParkFX

Get the Latest Information on the Most Reliable Backup Warning Technologies

Not all reversing aids are equal. The sensing technology and the indicating method are critical to your driving safety.

How a park assist system alerts you

One option is video, which at first seems like a great choice. But one major flaw with having a video camera affixed to the back of your car with a monitor on your dashboard is that it also forces you to look forward while backing up. That can disturb your perception, your reaction time, and feel very unnatural. They are also extremely expensive, and you'll pay thousands of dollars to have a video system attached to your car, whether from the dealer or an aftermarket supplier.

Compare that to other bargain basement devices which actually have LED displays (little red lights) on your dashboard. These are cumbersome -- almost useless -- for much the same reason as video: when you drive in reverse, you naturally look behind you, and you'll never see the little red lights. They are also hard to read in bright sunlight.

Some other bargain technologies use a tone which beeps more rapidly as you get closer to an obstacle. You can at least hear the relative distance just by listening to the beeps, but you have to practice a bit to really understand how far you are from danger.

That's why an audible voice sensor is best. It tells you in a spoken voice exactly how far away you are. Not only do you not have to awkwardly look forward at your dashboard, you'll know without guessing how much further you can safely back up.

How a reversing aid detects objects

If you've never seen or used a reversing aid, you might be surprised at how technically advanced they actually can be.

Reversing aids use a variety of technologies to sense an object behind the car. Some units use Doppler radar, and others use infrared sensors, but by far the most accurate method of detection is the one the U.S. Navy uses on its submarines: sonar.

Sonar can operate in any weather, including direct sunlight or rain. And it doesn't require that the car be moving in order to sense an obstruction.

How To Avoid Car Gadgets & Choose the Right Park Assist Technology for Your Driving Safety

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.

LaneFX Standard Features to Make Every Lane Change Safer

Q. Even though LaneFX is ultra simple concept, you've managed to make LaneFX a very feature rich product. Correct?

A. Absolutely. Let me give you a brief walk through of the features and add-on options of the LaneFX system:

1. First we talked about the universal fit of LaneFX.
2. Second, ease of installation (which you have to remember quick installations mean less cost of ownership to the customer and faster seamless installations mean higher customer satisfaction). The way we were about to simplified installation on hundreds if not thousands of power mirror systems is by using an Intelligent Learn Technology. So all the installer has to do is hook up a set of 3 wires on either side of LaneFX module. And then all the installer has to do is start learn mode and the unit "learns" the wiring setup of the vehicle and configures itself on that basis. No complex wiring diagram, no programming required.
3. Third, all mirror movements are fully customizable at installation. We wanted to make LaneFX as responsive to the driver and tailored to the driver's preferences as possible. So with every LaneFX unit, each driver can customize how far the mirror opens up, how long it pauses when it gets there, and even how fast the mirror should move. You can control your preferences separately for the right and left mirror.
4. LaneFX is intended to be a concealed unit either under the dash or in the trunk. So these adjustments should be made at installation and you can always tweak them or change occasionally after that.
5. Another feature we offer in the system is control of both mirrors. So you control the left and right mirror separately or concurrently.

Q. And all of these features you mentioned are standard in every LaneFX box?

A. Yes. That's correct.

Q. But I also understand that you have a number of optional add-on components that a customer can choose to further enhance his/hers LaneFX system.

A. Our team has worked very diligently to research what consumers would like to have in their complete LaneFX system. Let me share with you a quick list of what some of these options are:

1. First is a very inexpensive add-on component we have that we think is going to be very popular, especially among entry level domestic vehicles is the optional Mirror Speed Boost. With this component owners of vehicles with slow moving power mirrors can safely boost their mirror movement speeds up to 200% of OEM speed. This will provide drivers with a way to ensure that LaneFX movement is responsive to their driving needs. All of the mirror speeds are customizable by the driver from 80% to 200% of OEM speed, and those adjustments can be done separately for left and right mirrors.
2. Second we have a great optional component that's quite frankly is a driver awareness system in and of itself: ParkFX. ParkFX is an active park assist and curb exposure system that uses your side mirrors to expose the parking boundaries around your vehicle as your backing up. Much in the same LaneFX moves your mirror outward to expose the blind spot next to you and behind you, ParkFX tilts the blind spot mirror downward when you put the vehicle in reverse to expose either the parking lines let's say if you were in a mall parking lot, or more importantly to expose the curb in parallel parking situations. When you take the car out of reverse, the mirror comes back to its original position, every single time. Just like LaneFX, ParkFX is universal and fully-customizable to the driver's preferences. The system works on any vehicle, new or old, domestic or import, manual or automatic transmission. And you can choose to have ParkFX control the left, right or both mirrors. And to be complete, you can also configure at installation how much ParkFX should tilt each of these mirrors when the vehicle is backing up. So for a big SUV, you can choose the blind spot mirrors to tilt down farther than say someone who drives a small sedan. Everything is universal and fully-customizable to your needs.
3. Thirdly is an add-on component we are very proud of: our Turn Signal Link integration kit. I put my blinker on and that activates LaneFX to show me my blind spot before I change lanes? Yes exactly. And you can also configure the Turn Signal Link integration kit to activate only when the vehicle is moving above certain speed, like over 55mph to have it only activate on when you're on the highway, or say over 35mph in an urban city setting.
4. The forth in our options list is a plug-and-play wireless controls kit. We've heard time and time again that drivers would ideally like the LaneFX controls at the finger tips, just like your horn or turn signal stalk. this tiny module I am holding is an example of a left-hand wireless control. So we designed this wireless kit so that installers never have to worry about running wires to the steering wheel (which is a no no) and to give the customer to place the controls anywhere. The wireless controls kit includes two controls for left and right and is designed to fit behind one of your steering-wheel spokes. The placement is meant to avoid competing with the increasing number of OEM buttons on the front of the steering wheel. Also the placement behind the top spoke make the LaneFX control within the reach of a finger tip without having to move a hand off the steering wheel regardless in you drive with your hands in the 10-to-2 position or racing style.
5. One more plug-and-play optional component which is our Speed Sensitivity Mode. This is an add-on component that integrates with OBDII port of virtually any vehicle and continuously reads the vehicle speed. The LaneFX module is pre-programmed to take advantage of this option and it then produces more dynamic mirror movement based on the vehicle speed. This ensures an ever greater degree of responsiveness to the driver's needs in real-time. So LaneFX moves the mirror faster at say 70mph than at 55mph? Exactly right, and it also pauses less when it reaches its maximum expansion angle at higher speeds.