[2] At that time, southern Florida was undergoing a land boom, and the club wanted to attract new tourists to an easily reached fishing area.

In addition, the real estate interests wanted access to thousands of acres of wilderness in the Upper Keys to develop and sell.

Commissioners from Dade and Monroe Counties agreed to build a highway connecting Florida City to Key Largo.

The swing span drawbridge and road were both nearly ready for opening when, on September 18, 1926 a major hurricane seriously damaged both.

In addition to shortening the route by 13 miles (21 km), it enabled motorists to avoid the wooden bridges in northern Key Largo—including Card Sound.

[6] In the two decades after the removal of the Card Sound wooden drawbridge, various schemes to increase access between the Keys and mainland Florida came and went.

In the meantime, the United States Department of the Interior started purchasing land in Biscayne Bay with an eye toward creating a new National Park.

Actually, County Road 905A has its northern terminus at an intersection with US 1 in Florida City and its southern terminus at County Road 905 in northern Key Largo five miles (8 km) to the east of Card Sound Bridge (CR 905 continues southwestward eight miles (13 km) until it joins US 1).

Both CR 905 and 905A on Key Largo still show FDOT signs indicating State routes on their shoulders.