I-44 at Broadway in St. Louis ST. LOUIS -- A truck fire on an interstate in Downtown St. Louis is causing traffic backups on several other highways. The Missouri Department of Transportation says that eastbound I-44 is closed at Cole Street. The roads merge near the Mississippi River and this can cause backups on other interstates. Westbound I-70 appears to be backed up all the way to Riverview Boulevard. First responders are at the scene. It is…