A11 (Warning—Stone‐chips) is a Swedish road sign, belonging to the category of warning signs (group A). Closer provisions are given in the road sign ordinance (SFS 2007:90): The sign warns about a risk of stone‐chips. The sign shall not be used on gravel roads or similar roads where stone‐chips are a common occurrence.
transportstyrelsen.se 



Source materials for this file are available from Commons Archive:

Sweden road sign A11-1.eps
Government of Sweden