Why Road Signs Reflect Vehicle Headlights
A normal retroreflective road sign returns part of vehicle-headlight light toward the driver's vicinity.
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Traffic Signs
Guides to road sign visibility, reflective materials, approved artwork, supports, inspection and destination requirements.
Checking Traffic Sign Materials and Nighttime Visibility
Traffic sign acceptance should connect material identity, finished-product accuracy, and installed recognition.
Read GuideRoad Sign Artwork for Actual Road Conditions
Sign artwork should support the decision required at its location.
Read GuideLarge Traffic Sign Panel and Support Interfaces
The interfaces behind a large sign carry the panel's loads through the frame, clamps, pole, and foundation.
Read GuideObservation and Entrance Angles in Reflective Road Signs
Observation and entrance angles describe the relationship between illumination, the sign, and the observer.
Read GuideUS Sign Retroreflectivity Maintenance References
US retroreflectivity maintenance references need the adopted jurisdiction and method identified.
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