70 million Americans travel 50+ miles during 2021 US 4th of July weekend, AAA predicts worst traffic, Boston's Sumner Tunnel closed, record 3 million fly on Sunday.

70 million Americans travel 50+ miles during the 2021 US 4th of July weekend, with AAA predicting the worst traffic on Sunday between 2-8 PM. The Sumner Tunnel in Boston is closed for renovations until Aug. 5, affecting 39,000 daily drivers. A record 3 million are expected to fly on Sunday, possibly surpassing the previous record of 2.9 million set on June 23. Massachusetts has suspended most road projects until Monday morning.