Allegheny County, with support from Shiftworks Community + Public Arts, commissioned Marques Redd, Mikael Owunna, and Rainbow Serpent to highlight the iconic Pittsburgh bridges with a light show this winter. The Rachel Carson, Andy Warhol, and Roberto Clemente Bridges, known as the Sister Bridges, will display their installation The Three Sisters from November 23, 2024, through December 31, 2024.

To many indigenous peoples from North and Central America, the Three Sisters refers to their main crops of squash, maize (corn), and beans, which flourish when grown in close proximity. From Nigeria to Brazil and Cuba, the Three Sisters are associated with the Yoruba goddesses Oya, Oshun, and Yemaya. The Three Sisters fuses these narratives, with each bridge representing one crop and one goddess.