Variable Speed Limit Signs (VSLS)

McCain's Variable Speed Limit Sign (VSLS), featuring SWARCO's patented lens technology, allows agencies to adjust the speed limit in response to current road and traffic conditions, such as heavy traffic or adverse weather. Decreasing the risk associated with driving at speeds higher than appropriate in these types of conditions can improve traffic flow and safety. This highly energy efficient sign provides brilliant legibility and a superior luminance ratio resulting in outstanding reliability, quality and usability. 


  • Improve safety and traffic flow by adjusting speed limits in less than ideal conditions
  • Clear visibility and color uniformity from any angle with unrivaled contrast rations
  • Meets or exceeds NTCIP and NEMA TS 4 standards
  • Fully programmable
  • All control equipment is internally housed
  • Ultra-bright, full-color LEDs
  • Schedule for Day of Week, Month of Year, or any specific date(s)

Standard Features

  • NTCIP and NEMA TS 4 standards compliant 
  • 100 sign brightness levels under software or photocell control
  • Message is clearly visible when on and concealed when off
  • Internally-housed controller
  • All electronic assemblies are conformal coated for operation in harsh environmental conditions
  • Compatible with flashing beacon systems
  • Front and rea photocells
  • Door contact switch
  • 2 x 100 VAC utility outlets inside sign housing 
  • Optional RGB graphics support

General Specifications

Dimensions 60" H x 48 "w x 10" D
Display Dimensions 32 pixels high x 48 pixels wide
Enclosure Material: 5052-H32 aluminum
Finish: Display face is black, rest of face is retroreflective material
Access Front
Display Technology RGB LED with SWARCO 3G6 and 3G7 lens
Pixel Size & Spacing 20 mm
Pixel Inclination

3G6 optics ± 15.5°

3G7 optics ± 31°

"SPEED LIMIT" FHWA series E, 8" UC
Display Font McCain MUTCS Series "E"
Character Height 18" ir 22"
Power 120 VAC supply
Typical Power


Max Power



Operating Temperature: -37° C to +74° C
Humidity: 0 to 95% (non-condensing)


197 lbs