Whether residents like it or not: Despite vocal opposition from numerous South Natomas residents, the Sacramento Regional Transit District board decided overwhelmingly Monday night to build a light-rail line from downtown to Sacramento International Airport along Truxel Road. But deal’s not quite done. There’s still the matter of funding: RT General Manager Beverly Scott acknowledged, however, that the agency will not have the money to build the first phase, estimated at $291 million, unless county voters approve an extension and expansion of an existing half-cent sales tax for transportation projects. That issue may be on the county ballot as early as next November.