Changeable Speed Limit Sign
A changeable speed limit sign is a speed limit sign that displays the speed limit digits electronically using LEDs. Whereas the text "SPEED LIMIT" is permanently printed on the metal traffic sign, the digits showing the legal speed limit are electronic and can be easily changed based on time or other conditions.
Changeable Speed Limit Signs in School Zones
A school zone (or business campus) may have different speed limits based on school hours or the school calendar. A changeable speed limit sign's internal timer can be programmed by time of day, day of week, or even over a year to include a summer schedule. In this way, the changeable speed limit sign can display a low speed limit when school is in session and be set to a higher speed limit at other times so as maximize efficient traffic flow. The changeable speed traffic sign can also be set to turn on and off.
Maximize School Zone Safety with Violator Alert Radar
While a changeable speed limit sign can display the current speed limit in bright, clear LEDs there is an additional level of safety available—violator alert radar. Adding Violator Alert Radar to a changeable speed limit sign enables it to measure the speed of oncoming traffic. When a vehicle's measured speed is significantly greater than the displayed speed limit, the traffic sign will flash the speed limit LEDs to call the driver's attention to the fact that the vehicle is traveling and at an unsafe (and illegal) speed. This provides a strong signal to the driver to reduce speed immediately.
Two Models of Pole Mounted Radar Speed Signs From IDC
Information Display Company offers two pole mounted changeable speed limit sign models; CSL-1520F and CSL-1820F. The primary difference between the two traffic signs is the physical size of the speed limit display. The CSL-1520F is recommended for areas with speed limits up to 35 MPH or 55 KPH. The CSL-1820F has an 18-inch LED display and is for use in areas with higher speed limits.
IDC's Exclusive Technologies in Variable Speed Limit Signs
All changeable speed limit sign models incorporate IDC's exclusive UltraClear™ display technology, providing exceptional display clarity and contrast. Rather than compromise with conventional "non-glare" window material and colored lenses, IDC's UltraClear is a multi-faceted approach to contrast, glare, and intensity based on our many years of research. The result is an extremely high visibility under all lighting conditions.
Another IDC exclusive is our SafetyMask™ system. The high incidence of "rubbernecking" we've observed as drivers pass electric traffic signs concerned us enough to develop the SafetyMask system which permits display viewing only within a driver's normal field of view. By preventing viewing from acute angles, drivers' attention is not distracted to the side of the road at a time when it most needs to be on the road ahead. Bottom line is that SafetyMask enhances safety by focusing the driver's attention on the roadway—not looking sideways at the changeable speed limit sign.
Standard Features of the
Model CSL-1520F and CSL-1820F Changeable Speed Limit Signs
- Large, easy to read LED display
- CSL-1520F 15" high display with 30" x 42" sign. Recommended for posted speeds up to 35mph or 55kph
- CSL-1820F 18" high display with 36" x 48" sign. Recommended for posted speeds greater than 35mph or 55kph
- Flexible pole mount allows easy attachment to virtually all sized traffic poles.
- USDOT compliant "SPEED LIMIT" sign in standard white color is included.
- Two LED digits enable speed limit to be set from 0 to 99.
- 100% electronic LED display with solid state components offer no moving parts to wear out, stick, or break
- High visibility speed display—up to 1000 feet
- UltraClear II technology to optimize contrast, glare, and clarity under all lighting conditions.
- Auto dimming LEDs for optimum display in night conditions.
- SafetyMask technology to reduce driver rubbernecking
- Vandal resistant shatterproof window and impact absorbing display absorb shock by deflecting together up to 2.5 inches.
- Weather resistant housing and hardware are 100% aluminum and stainless steel to protect from corrosion. Installed sign is wind load rated to 90mph.
- Easy troubleshooting and repair—can be serviced by untrained personnel with standard hand tools.
- Two year product warranty with 8 year warranty on LEDs
Datasheet with complete specifications (.pdf)