Two blocks of the East Historic Columbia River Highway in downtown Troutdale will be closed on Friday, December 2 from 5:30 pm until as late as 8:30 pm during the citys tree lighting ceremony. The Historic Highway will be closed between S Buxton Avenue and SE Hawlow Avenue. SE Dora Avenue also will be closed between the Historic Highway and SE 2nd Street. Signs will direct through traffic to a short detour route. Interstate 84 is also an alternate route.