Tennessee law enforcement agencies will join forces to reduce injuries and needless deaths with increased enforcement this Independence Day holiday. This year’s July 4th holiday began at 6 Tuesday night and lasts through 11:59pm, Wednesday July 4th, a 30-hour holiday period. AAA estimates that a record number of Americans will hit the road for the July 4th holiday as many travelers will take week-long holidays with Independence Day on a Wednesday this year. AAA also estimates among the holiday travelers, 84 percent or 34.7 million, plan to reach their destinations by car.