Advisory Speed Sign

An Advisory Speed sign (W13-1) is added to a warning sign to advise motorists that a speed lower than the speed limit should be considered. The use of this sign is discussed in the (TMUTCD) and in .
The Advisory Speed sign should not be used by itself; it should only be used as a supplement to warning signs for:
  • curves and turns (W1-1, W1-2, W1-3, W1-4, W1-5, W1-10 series, W1-11, W1-13 and W1-15) (see the following subsection)
  • intersections (W2-1 through W2-8)
  • narrow and one-lane bridges (W5-2 and W5-3)
  • BUMP (W8-1) or DIP (W8-2)
  • descending grades (hills) steeper than 5 percent (W7-1 and W7-1a)
  • temporary traffic control zones
  • other conditions, as necessary.
These warning signs and their uses are discussed in the TMUTCD and the Procedures for Establishing Speed Zones manual.