DETROIT/SEOUL (Reuters) – Hyundai Motor Co plans to expand its U.S. factory, three people familiar with the matter said, hoping to ramp up production of sport utility vehicles (SUVs) as lower oil prices boost demand for gas-guzzling trucks. Sales of the South Korean automaker’s sedans like the Elantra and Sonata are slowing in the United States as consumers take advantage of lower fuel prices to switch to bigger, less fuel-efficient SUVs. State of Alabama is negotiating final terms,” one of the sources said, referring to the company’s planned new production facility.