HAYWARD — So-called "lane-splitting" on a motorcycle is perfectly legal, but Officer Cristina Tagle of the California Highway Patrol asks, "Is it really worth it?"Bikers have an obvious advantage when it comes to the daily commute, but Tagle said splitting lanes — riding alongside other vehicles, between lanes — carries significant risk, as exemplified by three deaths this year in the Hayward-San Leandro area. Earlier this month, John McGuinness, 45, of Alameda, was killed while splitting lanes on Interstate 880 in San Leandro. He lost control of his motorcycle and collided with two vehicles, police said. In June, Jason Amaya,...