If Lt. Gov. Gavin Newsom is elected governor as expected, he’ll keep building the state’s two contentious public works projects: the bullet train and twin water tunnels. But he’ll scale back both. He’ll be more cautious, realistic and practical about the super-expensive projects than termed-out Gov. Jerry Brown.Newsom will concentrate on completing a high-speed rail line from the San Joaquin Valley to the San Francisco Bay Area.