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Parents who want to teach their teenagers safe driving skills can purchase vehicle monitoring and recording devices to help.
Those devices are the descendants of event data recorders (EDRs), or black boxes, best known for helping reconstruct the events leading to airplane crashes.
EDRs have also been used on cars for years. Automakers use them to record vehicle data at the moment of impact, which helps them monitor air-bag effectiveness. Some devices are also used to monitor fleet vehicles.
Similar recording devices, capable of monitoring driving over extended periods of time, are now being marketed to parents of teenage drivers for their safety and educational benefits.
"Looking at teen drivers, people behave differently when they know they may be monitored, so there might be some benefit," says Russ Rader, director of public affairs for the Insurance Institute for Highway Safety.
We tested two top-selling recorders, the CarChip E/X with Alarm from Davis Instruments ($199) and the RS-1000 from Road Safety International ($280). We found the RS-1000 to be the better system.
HOW THEY WORK