A jackknifed truck closed the westbound lanes of Interstate 84 between Hood River and Cascade Locks for a period of time on Tuesday, and limited it to one lane during the afternoon.  According to the Oregon Department of Transportation, the accident occurred late Tuesday morning near Herman Creek.  The crash pushed median barriers into the eastbound lanes, and for a little over an hour left only the right eastbound lane open.  Both eastbound lanes and one westbound lane had opened, but ODOT said Tuesday afternoon the right hand westbound lane remained closed, and delays should be expected.  There were no injuries reported.