The lead-up to the July 4 holiday is already the busiest in history. Air travel is up more than five percent from last year. The TSA expects Friday to be the peak day for travel. If you're taking a road trip, expect heavy traffic. More than 60 million people are expected to drive during the July 4 weekend. Travel expert Pauline Frommer says the worst time to drive is in the afternoon any time during the week of July 4.
