specially adapted for signalling by sound or vibrations, e.g. rumble strips; specially adapted for enforcing reduced speed, e.g. speed bumps

Arrangement of road signs or traffic signals; Arrangements for enforcing caution > Road surface markings; Kerbs or road edgings, specially adapted for alerting road users > specially adapted for signalling by sound or vibrations, e.g. rumble strips; specially adapted for enforcing reduced speed, e.g. speed bumps

Arrangement of road signs or traffic signals; Arrangements for enforcing caution (for obstructing or restricting traffic E01F13/00) > Road surface markings; Kerbs or road edgings, specially adapted for alerting road users (for redirecting vehicles E01F15/00) > specially adapted for signalling by sound or vibrations, e.g. rumble strips; specially adapted for enforcing reduced speed, e.g. speed bumps