Minimum Letter Size and Series
- 2-lane roadway section (no more than one through lane in either direction) and ramps, regardless of the number of lanes 6" D
- 4-lane roadway section (undivided, divided, etc.) 8" D
The order of arrows and their destinations shall appear in the following order: Straight, left, right from top to bottom of sign. Destinations shown for each direction should ordinarily be the next county seat or the next principal city.
Arrows on Type D signs are not demountable.
Single Support Note
If Type D signs are erected on a single u-channel post, add the following note to the sign panel notes: “Erect sign on one U-Channel post.
MUTCD Section 2D-20 (Link)
Example Type D Panel Design
Applicable Standard Specifications
SECTION 901 SIGN FABRICATION
SECTION 903 GROUND MOUNTED SIGN SUPPORTS
SECTION 904 SIGN ERECTION
901.50 ARROWS AND SHIELDS
903.20 MOUNTING OF TYPE 'D', 'E', AND 'F' SIGNS ON WOOD POSTS
903.30 BARRIER SIGN SUPPORT ASSEMBLY
903.40 MEDIAN BARRIER SIGN SUPPORT AND ANCHORAGE
904.50 MOUNTING OF TYPE 'D', 'E' AND 'F' SIGNS ON 'U'-CHANNEL POSTS