Traffic signs
Every standard sign has a code in the MUTCD, and the code decides the shape, color and size. These guides are for the person who orders and installs signs, with the size table for each road type.
Warning signs
- School crossing sign
The S1-1 assembly, sizes, color and placement rules.
- Slippery when wet sign
W8-5 sizes, plaques, placement distances and sheeting.
- Stop sign ahead sign
When W3-1 is required, sizes and placement distance.
- Divided highway sign
W6-1 vs R6-3, sizes, and when each one is used.
- Chevron sign
When chevrons are needed, sizes, spacing and mounting.
Regulatory signs
- Wrong way sign
Sizes, pairing with DO NOT ENTER and exit ramp rules.
- Accessible parking sign
ADA height, R7-8 and van plaque, and a space calculator.
- Speed limit 10 mph sign
R2-1 sizes, who can enforce it, and mounting.
- No left turn sign
R3-2 and R3-1 sizes, placement and time-of-day options.
Temporary route signs
- Detour sign
Each detour sign by code, sizes and how many to order.
The rules behind these guides
- MUTCD Part 2
- sign codes, sizes (Tables 2B-1 and 2C-1), colors, placement and mounting height
- MUTCD Part 7
- school signs (Table 7B-1), which must be fluorescent yellow-green
- MUTCD Table 2A-5
- minimum retroreflectivity a sign must keep over its life
Other topics
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