The N&W placed speed limit signs in advance of curves where the speed was reduced from the normal track speed. These signs were made in the Roanoke Shops Foundry. Some signs contained a single speed restrictions while others had two sets of numbers with the bottom number relevant to freights while the top number applied to passenger trains. If the sign was applicable to more than one consecutive curve speed, there would be a small square with the number of curves covered under the speeds. The signs were painted yellow with black lettering on one side and black with white lettering on the other.