Researchers: LuAnn Theiss, Jeff Miles
Currently, Florida is one of only 4 states nationwide that requires the use of steady-burn warning lights on temporary channelizing devices and temporary barrier in construction zones. Steady-burn warning lights were predominantly used when only engineer grade sheeting was available. With the prevalence of brighter high-intensity sheeting, the need for steady-burn lights is questioned. This research project is intended to determine if these steady burn lights improve safety in construction zones.
Task 2 of this project is designed to evaluate the effectiveness of warning lights using two subtasks:
- Determine the impacts of field conditions on device visibility (including dirt on device surfaces)
- Determine the impacts of inclement weather on device visibility (with artificial precipitation)
In each subtask, the researchers intend to use photometric equipment to record the luminance of each reflective stripe, as well the steady burn warning light, on many channelizing devices in Florida work zones. The intent is to determine how much luminance each element contributes toward overall luminance of the devices. These measurements will be taken both with and without the warning light operating (i.e., covered to make appear inoperable). It is not known at this time how many steady burn lights deployed in the field are incandescent vs. LED-type.
Statistics will include average and standard deviation of luminance readings, luminance distribution curves, etc. We will also try to quantify luminance degradation over time if device deployment records are available.