40 mins to Tysons during the morning rush from Burke?? You gotta know backroads to do that. FFX County Parkway backs up heading north in the morning to 66 because of the Fair Lakes traffic lights. 123 backs up in the morning if you are thinking of cutting thru Fairfax. Unless you are doing HOV, it can take an hour to get from FFX County Parkway to 495 on I-66. Then there is the backup from 495 to get onto Route 7 into Tysons Corner.