Sometimes bigger is better—especially when it comes to safety. That’s why it comes as no surprise that the National Highway Traffic Safety Administration (NHTSA) recently awarded the 2015 Lincoln Navigator its highest score of five-stars in overall safety. “The 2015 Navigator combines the highest possible safety rating from the federal government with a fresh interpretation of the classic, full-size luxury sport utility vehicle,” said Steve Kenner, global director of the Ford Automotive Safety Office. “From its more refined appearance and luxurious interior appointments to its advanced safety systems and driver-assist features, the 2015 Navigator is what our customers asked for.” The Lincoln Navigator’s five-star safety rating was helped in part…