All lanes of northbound Interstate 5 are closed at OR 99W in Southwest Portland following a wrong-way crash early Tuesday. Traffic must exit the freeway at Exit 294, and may return to the northbound lanes at Terwilliger Boulevard. As an alternate route to downtown Portland, traffic may use OR 217 north to U.S. 26 east. The closure is expected to remain in place for several hours as crews cleanup an extensive debris field.