W1-3 (Horizontal Alignment - Reverse Turn) is an official MUTCD traffic sign designation within the warning sign family. Standard vector graphics are published by FHWA under Standard Highway Signs.
8 (18 × 18 in — Left arrow, 18 × 18 in — Right arrow, 30 × 30 in — Left arrow, 30 × 30 in — Right arrow, 36 × 36 in — Left arrow, 36 × 36 in — Right arrow, 48 × 48 in — Left arrow, 48 × 48 in — Right arrow)
W1-3 identifies a reverse-turn alignment condition, involving successive changes in direction. It should be distinguished from a single W1-1 turn symbol and from the W1-4 reverse-curve warning; these signs describe different patterns of roadway alignment.
What to verify
When matching a road segment, assess the sequence and severity of direction changes and compare the arrow orientation with the approach. Confirm the appropriate application and any advisory speed treatment using the governing engineering guidance.
For further context, read the related MUTCD guide and compare the official FHWA MUTCD. This independent reference does not replace engineering judgment or applicable state requirements.
