Interstate 90 is the longest route in the Interstate highway system. Along its 3,000 mile journey across the country, it crosses the southern half of South Dakota, from the Black Hills in the west to the Sioux Falls area in the east. Some of the more well known cities it serves are Sturgis, home of the annual motorcycle rally, Rapid City, the largest city in the Black Hills region, and Sioux Falls, the state’s largest city.
Our replica South Dakota Interstate 90 route sign is made to the exact 1957 standards used in the early days of the Eisenhower interstate highway system. This exact design was supplanted by the modern shield style in 1971. Compared with modern signs, the original has smaller numbers, and includes the state name, which is often omitted on newer issue. As years go by, it gets harder and harder to find the original-style Interstate route markers in many states. Here’s your chance to step back to the early days of America’s Interstate era…without facing the perils of high demand and low supply on the collector’s market.
Our South Dakota Interstate 90 marker is flat printed on heavy 14-gauge steel. It comes in sizes from 12 inches square all the way up to 36 inches square. No matter the size, we include two convenient mounting holes. Our Interstate 90 shield is non-reflective, making it perfect for everyday display, indoors or outdoors. (Looking for a sign for a different Interstate or state? Or perhaps a size not listed here? Or an entirely different sign? Please ask, as custom orders are our specialty!)