The busiest ocean trade route is the North Atlantic route. The North Atlantic route is a major shipping lane that connects Europe to North America, passing through the Atlantic Ocean. It is the busiest ocean trade route due to the high volume of goods and materials that are transported between Europe and North America, including crude oil, manufactured goods, and food products. The route is also significant because it connects the major ports of Europe, such as Rotterdam and Antwerp, to major ports in North America, such as New York and Montreal. The North Atlantic route is a critical component of global trade, and the high volume of shipping traffic on this route makes it the busiest ocean trade route in the world.