Print Two hundred miles of high-speed rail carrying electric trains moving twice as fast as the region’s trolley system. A dozen new stations, including massive hubs near the downtown airport and the Tijuana border. That’s the backbone of a recently released $160-billion blueprint aimed at making public transit as fast as driving a car — which elected officials from across the San Diego region are preparing to discuss Friday. Experts largely agree the plan’s long-term success would hinge on whether cities can usher in dense urban development around transit stations, at a time when birth rates in San Diego and throughout California are declining as overall population growth has all but come to a halt.