The Sanibel Causeway is a causeway in Southwest Florida that spans 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 3 miles (5 km) long from end to end, and currently has a $6 toll in effect for island-bound vehicles only. The bridges are not individually named, and are simply referred to as bridges A, B, and C. The islands are also named A and B. Both series begin from the mainland side.