Speed limits could be going up on some highways.
Many speed limits were reduced years ago to reduce air pollution. Now engineers say speed has little impact on what goes into the air so they want to raise speed limits again.
Limits could be raised on Interstate 20 in Tarrant County, Interstates 45 and 35E and U.S. Highway 67 south of I-20 in Dallas County.
It would be at least six months before any changes could go into effect.
KDFW FOX 4
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