The construction of a "dual freeway" at the northern end of I-805 was discussed as early as 1989, referring to the two carriageways needed for each direction of the freeway, resulting in four total. It would require drivers to use the new local lanes to access eastbound SR 56 from I-5 or I-805. The project would allow for trucks to use the new lanes to assist in merging with traffic. However, it faced opposition from local residents, concerned about the loss of the view from their homes, as well as environmentalists concerned about nearby wetlands. Further objections espoused the view that the congestion would continue to increase, regardless of what was done, and that the new road would be at capacity in a few years. The San Diego Association of Governments (SANDAG) funded the construction with $110 million (equivalent to $ in ) in mid-2000.