The manufacturing of interstate highway guide and regulatory warning signs requires expert level abilities and equipment to weld, saw, shear and punch metal. Interstate SignWays has the facility and expertise to produce any sign type using all necessary techniques. Green aluminum extruded and flat panel interstate highway guide signs vary in size and specification based on the state. A state DOT sign in Florida is not the same as the sign in Texas. Many factors in these differences include weather, geography, budget and historical influence. Due to the custom specifications and size of large overhead guide signs, they remain very much a handmade manufacturing process.