Design or auxiliary structures for compelling drivers to slow down or to

Official title: {Design or auxiliary structures for compelling drivers to slow down or to proceed with caution, e.g. tortuous carriageway; Arrangements for discouraging high-speed or non-resident traffic (decelerating or arresting surfacings E01C9/007; road surface configurating or surface arrangements for enforcing reduced speed or required caution, e.g. speed-control humps E01F9/529)}

E01C1/007 (Design or auxiliary structures for compelling drivers to slow down or to) appears on 1 US grants and 6 published applications in this corpus.