Interstate 84 will see periodic rolling slowdowns and delays Tuesday through Thursday as crews remove the lane restriction in place in place since September at Shellrock Mountain near milepost 52 west of Hood River.  Since the Eagle Creek Fire, I-84 traffic has been one lane each way for a little over a mile to allow room for crews clearing hazard trees and other fire debris from adjacent Shellrock Mountain.  Fire-related hazards have been cleared and I-84 at milepost 52 will be restored to two lanes in each direction by Friday afternoon.  Rolling slowdowns will create short windows without traffic allowing crews to safely remove temporary concrete barriers and restripe the highway.  Each rolling slowdown could generate 20 minute delays for travelers, and will take place as needed throughout the day, mostly from 9 a.m. to 2 p.m.  In addition, the right lane of eastbound I-84 will remain closed for about a mile at milepost 53 until December 18 for the construction of the Historic Columbia River Highway State Trail segment from Wyeth to Lindsey Creek.