The Sanibel Causeway is a causeway in Southwest Florida that spans the San Carlos Bay, connecting Sanibel Island with the Florida mainland in Punta Rassa. The causeway consists of three separate two-lane bridge spans, and two man-made causeway islands between them. The entire causeway facility is owned by Lee County and operated by the Lee County Department of Transportation. The entire causeway is three miles long from end to end, and currently has a six dollar toll in effect for island-bound vehicles only.