Texas Spur State Route 348 runs east-west in the northwestern portion of the Dallas Metro Area. This highway runs on Northwest Highway. TX SP St Rt 348 passes through the following towns in Dallas County. Dallas Irving TX SP St Rt 348 is not multi-plexed in Dallas County. TX SP St Rt 348 intersects the following highways in Dallas County. Interstate 35E, at Dallas. U.S. Rt. 77, at Dallas. Texas State Loop 12, at Dallas. Texas State Route 114, at Irving.
