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TERMINOLOGY
In-roadway warning light (IRWL) enhanced crosswalk systems are an integral component to traffic calming methodologies. In this industry there are a number of terms, acronyms, abbreviations, and words that have specific meaning to illuminated pedestrian crosswalk systems.
Any of the words or phrases can be copied into the search box to the left of this column. A resulting search will bring up multiple resources for each of these items.
- Automatic Activation Bollard - A vertical cylinder that hold sensor devices that cause the LED Lights in a Smart Crosswalk™ system to signal.
- Base Plate - These items securely hold the LED signal module and are embedded into the roadway.
- Bollard - A bollard is a short vertical post, originally it only meant a post used on a quay for mooring, the word now also describes a variety of structures to control or direct road traffic.
- Dove Prism - Patent pending technology now offered in our signal head modules using a “prism” inserted in in front of the LED lamps.
- Enlighten 1™ - Is a trade name referring to the flashing light rate pulsated by LightGuard LED lights.
- FHWA - Federal Highway Administration
- Illuminated Pedestrian Crosswalk - Refers to crosswalks that have LED enhanced in-pavement signal lights.
- In-Pavement Signal Light - LED enhanced lights embedded in the roadway.
- IRWL - In-Roadway Warning Lights
- ISAD - In-surface activation device, a LightGuard proprietary product used when sharp right turns at a crosswalk prevent the installation of an automatic activation bollard.
- LED - Light emitting diodes.
- LED Enhanced Signs - Signs that have attached LED lights.
- MUTCD - Manual on Uniform Traffic Control Devices - authored by the FHWA as guidelines for traffic controls.
- PCU - Power Control Unit, this refers to the activation control units for our LED signaling systems.
- Push Button - Refers to manual activation devices, usually found on a pole or bollard at the crosswalk entrance zone.
- RAD - Remote Activation Device, an infrared light beam that when broken sends a call signal to a LED signaling system.
- Red Light Running -
These are attempts by motorists to race to a signalized intersection and typically they fail to stop at a red light.
- Signal Head Module - This is the housing for solid state electronic holding the LED laps and dove prism lense.
- Traffic Calming - This the slowing or reduction of motor-vehicle traffic to improve safety for pedestrians and bicyclists and improve the environment for residents.
- Zone of Convergence - This is an area 200' - 400' in advance of a Smart Crosswalk™ system where the Enlighten 1™ LED light beams from the in-pavement signal lights merge at the eye level of the approaching motorist.
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