Following four years of intensive study, in 2008, the partnership concluded its coordinated environmental study identifying the bridge and plaza locations on both sides of the border, the Ontario access road (now known as the Rt. Hon. Herb Gray Parkway), and the U.S. interchange connection as the technically and environmentally preferred alternative (TEPA).
In 2009, the partnership received approvals under the Ontario Environmental Assessment Act (OEAA). and the Canadian Environmental Assessment Act (CEAA) On the U.S. side, the Federal Highway Administration issued a Record of Decision under the National Environmental Policy Act (NEPA) approving the U.S. portion of the new Detroit-Windsor border crossing system over the Detroit River.