Bicycle Hill, Color
Other bicycle warning signs such as the Hill sign may be installed on bicycle facilities to warn bicyclists of conditions not readily apparent. If used, other advance bicycle warning signs should be installed no less than 15 m (50 ft) in advance of the beginning of the condition.
GalleriesAdvisory and Warning Signs
Federal Highway Administration Manual on Uniform Traffic Control Devices for Streets and Highways, 2003 Edition (including 2004 and 2007 revisions) (Washington, DC: United States Department of Transportation, 2007)