Baltimore Salt Boxes are wooden boxes with hinged covers distributed annually to supplement the city's snow removal and road salting operations. They are a service of Baltimore's Department of Transportation, and we distribute the boxes around the city in the late fall in anticipation of winter weather. https://transportation.baltimorecity.gov/salt-boxes 

The saltboxes often get removed in the Spring (April 15th is known as Saltbox Ascension Day) and come back in the Winter (November 15th is Saltbox Descension Day), but any saltbox free of art is fair game for decoration.

Panels to decorate panels should be 17″ x 23″ panel