The “Koningin Juliana Brug” was opened to traffic on 2 March 1974. The official opening took place on Queen's Day, 30 April 1974.
As a result of the booming oil refinery, increased shipping, and heavy traffic, serious traffic jams were caused on the “Handelskade” (one of the most prominent quays at the harbor). Delays because of traffic jams could run up to 45 minutes. Various plans for a permanent bridge across the St. Annabaai or even a tunnel under it, were made between 1946 and 1961.