Linked sign layout files in PDF format provided courtesy of FHWA's MUTCD website Unauthorized use of text, images, and other content is strictly prohibited. Refer to Copyright, Disclaimer, and Standard Use Agreement for details., M1 Series Signs - Numbered Route Markers and Shields M2 Series Signs - Junction Signs M3 Series Signs - Cardinal Direction M4 Series Signs - Special Route M5 Series Signs - Advance Turn M6 Series Signs - Directional Arrow Manual of Traffic Signs Main Page Richard C. Moeur's Home Page Updated 11 February 2019 (M6s revised) Scripting: Richard C , Problems with viewing or editing the PDFs? Download and open them in Adobe Reader Regulatory Signs, Green: Section updated to full 2009 MUTCD compliance, with updated and improved graphic files, Manual of Traffic Signs - W4 Series SignsW4 Series Signs - Merge, Lane Transition, and Cross Traffic, Traffic signs are devices placed along, beside, or above a highway, roadway, pathway, or other route to guide, warn, and regulate the flow of traffic, including motor vehicles, bicycles, pedestrians, equestrians, and other travelers..