MUTCD 11th Edition (2023)
Section 2A.21 — Retroreflection and Illumination
Manual on Uniform Traffic Control Devices, Section 2A.21. Standards, guidance, options and support statements, with figures and cross-references.
Section 2A.21 Retroreflection and Illumination Support: 01 There are many materials currently available for retroreflection and various methods currently available for the illumination of signs and object markers. New materials and methods continue to emerge. New materials and methods can be used as long as the signs and object markers meet the standard requirements for color, both by day and by night. 02 This Section applies to visibility of signs at night or in low-light or adverse weather conditions, whose legends are otherwise visible under typical daytime viewing conditions. 03…
The rest of Section 2A.21 — Retroreflection and Illumination is for members
You're reading the opening of Section 2A.21 — Retroreflection and Illumination. Members see the complete text, every cross-reference and the tools on this page — free for 14 days, no card required.
- Full section text with Standard / Guidance / Option / Support labels
- Figures and tables referenced by this section
- Search across the whole MUTCD and every federal standard
- Ask Copilot about this section, with citations