 Northwest traffic from the High Performance Homes Traffic Center. Heavy traffic heading into downtown. Construction by Boeing Field has northbound I-5 down to two lanes. Traffic is stop and go for a couple of miles around Boeing Access Road. Over a 30-minute delay getting to the city right now. Northbound 99 is a good alternate route until it jams up at the stadiums and it's slow up until Mercer Street. And Mercer Street is absolutely jamming around Seattle Center and South Lake Union. Same with Denny Way.