Warning Signs

Warning Signs give motorists fair warning of what lies ahead. Every highway system has danger zones. Curves, intersections, railroad crossings, narrow bridges and no passing zones are all hazards for the motorist -- and these danger zones can be deadly.

Fatal accidents can be the result of inadequately marked hazardous roads. To help advert such tragedies, warning signs must be bright enough for clear visibility under all driving conditions, particularly at night. Sign angularity is critical. It means warning signs must be bright and visible even when misaligned or placed at high angles, on the left side or far off of the roadway.

Our warning signs meet all of these requirements. They are exceptionally bright and visible from wide viewing angles, across long distances and for many years of service.

All Warning Signs are made with 3M™ Scotchlite™ Reflective Sheeting in Engineer Grade, Hi-Intensity Prismatic, Diamond Grade, or Fluorescent Grade on Aluminum or as a Face Only.

View the 2009 MUTCD with Revision 1 & 2 for Warning Signs for more information.

For Temporary Signs view the 2009 MUTCD with Revision 1 & 2 for Temporary Traffic Control.

Sample Warning Signs are Shown Below:

W21-1

Workers Symbol
  • w21-1aw21-1a
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-1a

Workers
  • w21-1w21-1
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-2

Fresh Oil
  • w21-2w21-2
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-3

Road Machinery (*)
  • w21-3w21-3
Available Sizes
  • 30x30
  • 36x36
  • 48x48

*500 FT, 1000 FT, 1500 FT, 1/2 MILE, 1 MILE, or AHEAD

W21-4

Slow Moving Vehicle
  • w21-4w21-4
Available Sizes
  • 36x18

W21-5

Shoulder Work
  • w21-5w21-5
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-5a

Right Shoulder Closed
  • w21-5aw21-5a
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-5b

Right Shoulder Closed (*)
  • w21-5bw21-5b
Available Sizes
  • 30x30
  • 36x36
  • 48x48

*500 FT, 1000 FT, 1500 FT, 1/2 MILE, 1 MILE, or AHEAD

W21-6

Survey Crew
  • w21-6w21-6
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-7

Utility Work Ahead
  • w21-7w21-7
Available Sizes
  • 30x30
  • 36x36
  • 48x48

W21-8

Mowing Ahead
  • w21-8w21-8
Available Sizes
  • 30x30
  • 36x36
  • 48x48

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