A Bellefonte exit on Interstate 80 will be closed around the clock for nine days starting Sunday for work on the high-speed interchange project connecting I-80 and I-99, according to PennDOT. Exit 161 and the right lane of I-80 eastbound will close at 6 p.m. Sunday for the contractor to begin replacement of a box culvert. During the closure, eastbound traffic will use the crossover lane at mile marker 159.2 to travel across the median onto I-80 …