The Causeway is a narrow strip of reclaimed land and bridges in the north of Bermuda linking Hamilton Parish on the mainland in the southwest and Bermuda International Airport on St. David's Island in St. George's Parish in the northeast, which are otherwise divided by Castle Harbour.
The need for such a roadway was long-known to Bermuda's authorities. In the early 19th century, a committee was established to investigate possible plans. It would not be until 1867 that a valid plan, that by Lt. Albert Hime of the Royal Engineers, was approved.
Built by the Royal Engineers, Hime's Causeway was opened to traffic on 19 September 1871 by Governor Lefroy. The construction project cost £27,000 (in comparison, the local government raised only £25,000 in revenue for that year). Originally, it spanned from Blue Hole Hill, across the Cartwheel Islands (four small islets that are no longer visible) to Longbird Island. The project also included a new road in Bailey's Bay and across Longbird Island, and a swing bridge from Longbird to St. George's, finally giving an uninterrupted land route from the burgeoning main island to the old colony.
Until World War II, there were virtually no motor vehicles allowed in Bermuda, and only bicycles and horse-drawn carriages used the Causeway. The Bermuda Railway operated island-wide, providing rail passenger and freight service between St. George's and Somerset in Sandys Parish, Bermuda. Consequently, the causeway was lightly used. With the construction of the Kindley Field airbase by the U.S. Army Air Force in 1942–1943 and the relaxation of the ban on motor vehicles for essential military uses during the wartime emergency, motorized vehicle use of the causeway increased significantly.