|30" x 30"
|36" x 36"
MUTCD: Section 2C.36 Advance Traffic Control Signs
Standard: 01 The Advance Traffic Control symbol signs (see Figure 2C-6) include the Stop Ahead (W3-1), Yield Ahead (W3-2), and Signal Ahead (W3-3) signs. These signs shall be installed on an approach to a primary traffic control device that is not visible for a sufficient distance to permit the road user to respond to the device (see Table 2C-4). The visibility criteria for a traffic control signal shall be based on having a continuous view of at least two signal faces for the distance specified in Table 4D-2.
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||36 x 36
||Public low volume roads, local streets & roadways, 35mph or less.
||Public single & multi lane conventional roads, any speed.
See Table 2C-2 of the MUTCD for more info on size requirements.
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