The National Highway Traffic Safety Administration estimates that nearly 3,500 people were killed in crashes involving distracted drivers in the mainland U.S. and Puerto Rico in 2015, up from nearly 3,200 in 2014.

The number of fatalities in crashes involving a cellphone increased from 405 in 2014 to 476 in 2015.   Police departments around the country have gotten creative.

In Maryland, an officer disguised himself as a homeless man, stood near a busy intersection and radioed ahead to officers down the road about texting drivers.  WILX-TV 10 has the latest.