Newfoundland and Labrador Route 340 has a length of 106.3km (66.1 miles), connects to Route 331 as you continue northeastward, then connects to Change Island and Fogo Island, then passes through Boyd's Cove until you reach the main island of Newfoundland and New World Island.
The highway has a total length of 106.3 kilometres (66.1 mi) and a speed limit in the range of 4080 km/h depending on whether the road is passing through a settlement. Continuing northeastward, the route also intersects Route 331. This route leads to ferries connecting Change Islands and Fogo Island with the main island. Route 340 then passes through the community of Boyd's Cove. Afterwards, the route leads northward through a series of causeways that connect the main island of Newfoundland with New World Island. 
