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St. Johns County traffic official explains why signals appear to 'skip' cycles and how drivers can help
Summary
A St. Johns County traffic official described how video-based vehicle detection systems work, why drivers sometimes perceive skipped signal cycles, and advised residents to report concerns via the SJC Connect app while offering driver tips to improve detection.
A St. Johns County traffic official explained how video-based vehicle detection at intersections determines when signals change and why drivers sometimes perceive that a signal cycle was skipped.
The official said cameras and detection zones sense waiting vehicles and communicate with the signal controller. On the system display, detection zones appear as black outlines when empty and change to blue when a vehicle is detected. The controller then services only the phases that show detected, waiting movements.
Understanding…
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