How Hit and Run accidents relate to worn out crosswalks and missing traffic signals. Are they the major cause? Every corner needs a camera and every street needs speed monitors and repainting of crosswalks.

A hit-and-run crash occurs about once every 18 minutes in Los Angeles, according to data analyzed by the NBC4 I-Team that illustrates the extent of a problem that has been called an "epidemic."

The I-Team examined data reported to the California Highway Patrol on all hit-and-run cases in Los Angeles County for 2015. More than 28,000 reported hit-and-run crashes during that year occurred over a widespread area of the county at an alarming rate and 50 percent of all incidents in Los Angeles County are hit-and-run cases.