Solar Road Studs For Motorway ODM Road Marker-Nokin . Solar Road Studs,Road Studs,Solar Driveway Lights-NOKIN The recommended spacing between each solar road studs are as follows: Highways and Expressways 7 - 8 yards (5 - 6 meters) Dangerous Entrances and Exits 4 - 5 yards (2 - 3 meters) Access or Exit ways for Hospitals, Parking Lots, etc. 0.5 - 3
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