SAN DIEGO — Caltrans has moved closer to installing a suicide barrier on the San Diego-Coronado Bridge with a new report that identifies a vertical stainless steel net as the best option. The net would be 8 to 10 feet tall, according to the report. It would be attached by cables to poles bracketed onto the bridge’s 34-inch-tall concrete side walls. More than 400 people have died jumping 200-plus feet into the water off the bridge since it opened in 1969, making it second only to San Francisco’s Golden Gate Bridge for the most suicides statewide. The concentration of deaths there is the highest…