More than 100 cars and trucks were backed up for miles — and hours — Sunday on Interstate 40/85 in Alamance County following a chain reaction of collisions. The pile-up began with a five-car wreck sometime around 4 p.m., according to N.C. Highway Patrol, and accidents started occurring on both sides of the interstate soon after and continued throughout the night, until 10 p.m. “It was almost like watching dominoes fall,” said Sgt. Danny Jenkins, of Highway Patrol. An estimated 134 vehicles wrecked, Jenkins said, and traffic remained backed up from exit 153 in Mebane to exit 147 in Graham, with the majority of the collisions occurring around exit 150.