Motorists will see new speed limits on select highways in Eastern and Central Oregon starting Tuesday.  Two bills signed by the Governor in the past year raises speed limits on Interstate 84 east of The Dalles, Interstate 82, and other select secondary state highways in eastern and central Oregon.   The new law will raise legal speeds to 70 miles per hour for passenger vehicles and 65 mph for commercial trucks on I-84 between The Dalles and the Idaho border.   In addition, sections of eight other highways will have speed limits increased to 65 mph for passenger vehicles and 60 mph for trucks, including portions of U.S. Highways 97 and 197.  Signs displaying the new speed limits are expected to be installed on I-84 by Tuesday and on secondary highways within a few days of the effective date.   Those signs displaying a speed “limit” will be subject to enforcement by the Oregon State Police as differentiated from the “basic speed rule” that applies when no “limit” is indicated. (photo courtesy Oregon Department of Transportation)