The County Traffic Engineering Division implemented a countywide Retroreflective Backplate Installation Program to enhance visibility and safety at signalized intersections.
Program Details
Retroreflective backplates consist of a yellow retroreflective strip (1–3 inches wide) applied along the perimeter of a signal head backplate, creating a distinct rectangular outline visible at night and during low-light conditions, consistent with MUTCD Section 4D.12.
Program Implementation
Rather than creating a separate capital project, the County adopted an operationally efficient implementation strategy:
- Reflective tape is installed by the signal maintenance contractor
- Installation occurs during routine signal response or repair calls
- Contractors utilize the existing bucket truck mobilization
- No additional traffic control mobilization is required
This integration significantly reduces implementation costs while accelerating deployment.
Results and Merit
Signalized intersections, particularly during nighttime, power outages, glare conditions, or complex visual environments, can present visibility challenges.
Research from FHWA identifies retroreflective backplates as a Proven Safety Countermeasure, with documented reductions of:
- 15% total crashes
- Up to 40% angle crashes
- Significant reductions in nighttime crashes
Instead of implementing retroreflective backplates solely through large capital improvement projects, the County developed a systemic, maintenance-based deployment strategy.
Key Innovation:
✔ Install reflective tape during routine signal repair visits
✔ Utilize existing bucket truck access
✔ Apply tape while performing cabinet, head, or indication repairs
✔ Avoid stand-alone mobilization costs
This “piggyback installation” approach:
- Reduces labor costs
- Eliminates duplicate equipment deployment
- Minimizes intersection disruption
- Accelerates systemwide implementation