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"The No. 1 killer of teenagers are traffic collisions, so we wanted to do something to help," said Quest Driving Safety co-founder Gary Lawrence, a detective with San Diego Police Department.

Lawrence and retired SDPD Det. Phillip Hubb founded the new company.

If contacted for service, off-duty police officers in their personal cars will follow the selected driver for roughly 15 minutes, and within those 15 minutes Lawrence said, "It will provide a snapshot of how the person really drives when they think nobody's watching."

The service doesn't just apply to teen drivers, but elderly and even commercial drivers.

For a $99 fee, the off-duty officers will use a 22-point, A-F grading system for their evaluations.

"We not only want to point out potential problems, but also report good driving behaviors as well," said Lawrence.

Lawrence said they want drivers to know they are being evaluated, they just won't know when, which he believes will encourage better driving habits.

The program is due to roll out to 285 cities nationwide Tuesday.