The Braintree Split is the intersection of Interstate 93/U.S. Route 1 and Massachusetts Route 3 located along the city line separating Braintree and Quincy, Massachusetts. The Braintree Split was also the southern end of Route 128 until 1997, when Route 128 was truncated to the I-95/I-93 intersection in Canton. Weekday traffic volume through the intersection averages 250,000 to 275,000 vehicles per day.