(Portland, OR) -- ODOT is planning overnight closures of I-5 on four nights in November that will cause major delays. Crews will be installing new RealTime signs over the freeway. On November 4th, 6th, 10th, and 13th, I-5 will be closed in both directions between the Ross Island Bridge and Terwilliger Boulevard from 11 p.m. to 5 a.m. I-205 will be the detour for vehicles going north and south of Portland, but local traffic will need to use secondary roads and that will cause significant delays.