 Northwest traffic from the High Performance Homes Traffic Center. A big crash in Des Moines on northbound I-5 near 516 is clear now, but it's taking a while to clear out the three-mile-long backup. And there's more trouble heading north into downtown. Construction on northbound I-5 has the road down to two lanes at Boeing Field, and northbound I-5 is jammed up at the merge with I-90 running slow throughout downtown. Drive time from Tacoma to Seattle is still over an hour and a half.