Have CalTrans , city, etc Use Glowcones for Night use.
Cones glow via liquid phosphorous gel within cones.
& connect by wires to Gen unit module ( Honda size type).
Add & remove Cones as needed.

Visible from 40-50 ft away or 30 yards.
& or add Audio Beacon for Fog Use.

All CA cities, Counties.

Made in CA, other states.

& use same cones in day Unplugged & save money
& can be Runover & reused.
Reuse tires to make Glowcones.