Signature Streetscapes custom metal street signs are manufactured per the U.S. Bureau of Public Roads Standards and are in accordance with the Federal Standard Highway Signs Manual. The aluminum substrate base for our street sign blanks is chemically treated to add longer life and weather resistance. Aluminum blanks are covered with reflective material on both sides. Choose from two grades of reflective material (High Intensity & DG3) in five standard highway color options. Be sure to ask us about custom options and bulk pricing.