Highway Department 116 E Interstate 40 Shamrock, TX 79079 Phone : (806) 256-3206 Business Category Highway & street construction Road Maintenance Local-shamrock--transportation Department Of Shamrock, TX 79079 Phone : (806) 256-3206 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools Shamrock--texas Dept Of Transportation Hc 3 Box 38 Shamrock, TX 79079 Phone : (806) 256-3206 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools Texas State Of--transportation Department I H 40 E Shamrock, TX 79079 Phone : (806) 256-3206 Business Category Government Offices-State Transportation Services Local Passenger Transportation Government Offices State & Local Government Offices & Public Schools