 The Port of Miami Tunnel project involved the design and widening of the MacArthur Causeway by one lane in each direction leading up to the tunnel entrance, the relocation of Parrot Jungle Trail, and the reconstruction of roadways on Dodge Island.The tunnel itself has two side by side tubes carrying traffic underneath the cruise ship channel of the Government Cut shipping lane.Jacobs Engineering Group was responsible for the design of the roadways, Langan Engineering & Environmental Services was the geotechnical engineer, and Bouygues was the prime contractor for the tunnel project itself.