Arrangement of road signs or traffic signals; Arrangements for enforcing caution (for obstructing or restricting traffic E01F13/00)

Child Classifications

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• E01F 9/20 Use of light guides, e.g. fibre-optic devices
• E01F 9/30 Arrangements interacting with transmitters or receivers otherwise than by visible means, e.g. using radar reflectors or radio transmitters (E01F11/00 takes precedence)
• E01F 9/40 Arrangements responsive to adverse atmospheric conditions, e.g. to signal icy roads or to automatically illuminate in fog; Arrangements characterised by heating or drying means
• E01F 9/50 Road surface markings; Kerbs or road edgings, specially adapted for alerting road users (for redirecting vehicles E01F15/00)
• E01F 9/60 Upright bodies, e.g. marker posts or bollards; Supports for road signs