Extinguishable Message Signs

Extinguishable Message Sign (EMS) provides a clearly visible fixed message to en-route motorists. Strategically placed, this sign improves overall safety by providing motorists with pertinent roadside information or warnings. Commonly used EMS applications include safety information near airports, data regarding direction or availability for carpool lanes or toll roads, radio frequencies for advisory radio stations, and general traffic alerts. SWARCO McCain’s EMS signs are the perfect addition to your overall Intelligent Transportation System (ITS) and can improve traffic flow and safety in your jurisdiction.


  • Meet all Caltrans TEES Chapter 8 Specifications
  • Modules are fully interchangeable without switch or jumper settings facilitating quick and efficient service or repair
  • Solid, external matrix module covers (1 hole for each cluster) reduce glare and provide increased message contrast and visibility
  • Standard assemblies assure interchangeability of components
  • Advanced LED pixel matrix module design
  • Three Caltrans configurations available (500, 510, and 520) to meet your needs

Standard Features

  • LED’s mounted on circuit boards (LED pixel type 2)
  • Operates with a 170E controller, CIA and PDA-3
  • Z-bar mounting brackets on rear
  • All exterior seams continuous welded
  • Operates with Sign View software available from Caltrans
  • Can withstand temperatures ranging from -37° C to 74° C and humidity from 0 to 95% (non-condensing)

General Specifications

Dimensions M
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