In June 1990, the Del Mar Terrace Conservancy and the Carmel Valley Coalition sued the San Diego City Council to require them to move the western terminus of SR 56 closer to Sorrento Valley. On August 1, the City of San Diego received a petition in which more than 45,000 people requested that the City Council overturn their decision or refer it to a public referendum. The City Council backed down and rescinded the appropriate zoning changes on August 7, in efforts to keep the city from having to run a special election. They also approved the plans for the eastern portion between Black Mountain Road and I-15. Meanwhile, the Carmel Valley Coalition sued the city as well. The California Coastal Commission approved the construction on September 13, and several local residents representing both sides of the debate attended the meeting in Marina del Rey.