The westbound lanes and exit ramps of Anthony Henday Drive at Calgary Trail were backed up Tuesday afternoon while crews responded to a single-vehicle crash. Eastbound lanes onto the Henday from Calgary Trail were also backed up, said a media release from Edmonton police around 5:25 p.m. Tuesday. Drivers were asked to avoid the area and find alternate routes. Emergency crews were on scene and police are investigating the crash. Traffic was flowing through the area regularly shortly after 8:30 p.m.