The bill authorized $15 million (about $ in US-GDP dollars)US-GDP in federal funding, and the cities of Oceanside, Carlsbad, Vista, San Marcos, and Escondido agreed to pay $6 million (about $ in US-GDP dollars);US-GDP the total cost was $30 million (about $ in US-GDP dollars).US-GDP Caltrans predicted that without the widening project, traffic speeds on SR 78 would be as low as 15 mph by the year 2000 because of congestion.