FILE - In this Nov. 21, 2018, file photo taken with a long exposure, traffic streaks across the John F. Kennedy Expressway at the start of the Thanksgiving holiday weekend in Chicago. (AP Photo/Kiichiro Sato, File)CHICAGO – Two people were killed and two more were seriously injured early Friday when their vehicle hit a concrete wall and plunged off a Chicago expressway onto a street about 43 feet (13 meters) below, police said. The vehicle “was traveling too fast for road conditions” on Interstate 55 — also known as the Stevenson Expressway — when the accident happened at around 4 a.m., Illinois State Police said. The vehicle tumbled off the highway, struck a light pole and landed on the street in the McKinley Park neighborhood on Chicago’s Southwest Side, Illinois State Police Trooper Omoayena Williams said. The Chicago crash comes days after a pickup truck plunged about 70 feet (21 meters) off a slippery interchange exit ramp in Wisconsin.