Additional Details
MUTCD Section 2D.15 Cardinal Direction Auxiliary Signs M3-1 through M3-4
Guidance: Cardinal Direction auxiliary signs carrying the legend NORTH, EAST, SOUTH, or WEST should be used to indicate the general direction of the entire route.
Standard: To improve the readability, the first letter of the cardinal direction words shall be ten percent larger, rounded up to the nearest whole number size. If used, the Cardinal Direction auxiliary sign shall be mounted directly above a route sign or an auxiliary sign for an alternative route.