A police officer operating radar on a New Jersey roadway was struck and killed by a tractor trailer Thursday, authorities said. Officer Christopher Goodell, 32, was a five-year veteran of the force and recently engaged. He was working for the Waldwick Police Department when he was killed, officials said. A tractor trailer traveling down Route 17 struck the officer near Bergen Avenue about 1:30 a.m., according to John Molinelli, Bergen County prosecutor. It happened in Waldwick, a borough of about 9,600 in Bergen County.