Test air leakage rate: With a fully-charged air system (typically 125 psi), turn off the engine, release the service brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles.
Construction on the Coronado Bridge began in 1967. Almost 500 prestressed concrete piles were fastened to the sea floor of the bay to provide the foundations for the bridge. The steel and concrete components were largely built offsite, then assembled together from marine construction barges over the bay.
Coronado Bridge - San Diego, California - Award-Winning, Landmark Bridge. At a length of 2.12 miles (11,179 feet), the landmark San Diego-Coronado Bridge is better known locally as the Coronado Bridge. It crosses San Diego Bay, stretching in a sweeping 90-degree arc to join Interstate 5 in San Diego with Route 75 on the Island of Coronado.