WASHINGTON (AP) — Red-light cameras are widely hated, but a new study says getting rid of them can have fatal consequences. Traffic deaths from red-light-running crashes go up by nearly a third after cities turn off cameras designed to catch motorists in the act, according to a study by the Insurance Institute for Highway Safety. While cities continue to add cameras at intersections with traffic signals, at least 158 communities have ended their red-light camera programs in the past five years, the study said. Jake Nelson, the AAA automobile club's research director, said the club supports the use of red-light cameras if they're used properly, meaning data show the need for them at particular intersections — usually, a high number of fatalities. Other studies have shown that red-light cameras increase the likelihood of rear-end crashes as motorists race through yellow lights only to run into the back of a vehicle on the other side of the intersection.