A man is in the hospital with serious injuries after being hit by a car near the Plumb Lane/Villanova off ramp from southbound I-580 last night. The first call to the NHP was about a pedestrian on the freeway, by the time they responded the person was already injured. Nevada Highway Patrol says it is unknown if speeding or impairment were factors of the crash at this time. The driver is cooperating with the investigation.