Interstate Business Route 27
Interstate 27 has two active business routes. TxDOT assigned a suffixed to every Interstate Business Loop in the state. This distinguishes the various routes from one another in the Highway Designation File.
When U.S. 87 shifted to the freeway bypass west of the city, the former alignment was designated as U.S. 87 Business and then State Loop 445. Business Loop I-27 was established on January 14, 1991 in a mileage transfer from SL 445.
Page updated August 24, 2016.