If live, work or are traveling today, here's a reason to plan ahead, or at least know why you'll be stuck in heavier traffic during the evening rush hour tonight. Westbound Century Blvd. will be closed from 4:00 to 7:00 p.m. with drivers being diverted north to Aviation, then west on Arbor Vitae to Airport heading south and back on westbound Century. Eastbound lanes exiting LAX will not be affected. But why is this happening?......