I've been asked to create a map indicating the major highways throughout the state of Michigan. I've searched discussion groups & google for downloadable blocks. Unfortuantely, I haven't had any luck finding any... Does anyone happen to know where I could download standard US highway road signs?
Have you tried using the SYMAP text style? Lower case "m" is the U.S. Highway symbol, and lower case "p" is the Interstate Highway symbol. If you center justify them, you can put center-justified numbers (also SYMAP) inside the symbols.
You haven't posted if the above response worked for you. Just in case it didn't here are two dwg files that I use in location maps that are usually 1:500'000, so you might want to play with the scale to suit. They are a bit more simple in style, but easy to insert as you just click where on the road you wish to place them for the insertion point. Then text edit the road/hwy number.