Safe Highway Markings Act of 2011 - Prescribes standards for glass beads used in pavement markings, limiting the arsenic or lead content to 200 parts per million.
Requires the Secretary of Transportation to withhold up to 5% of the apportionment of federal-aid highway funds for any state that fails to enforce requirements to ensure that glass beads used in pavement markings on or along federal-aid highway roads or highways do not contain more than 200 parts per million arsenic or lead.