sentences:  The construction of the junction was said to be rushed during the 1960s boom, with a lack of drainage and permeable concrete, and deteriorated, with pieces of concrete slabs falling from overpass structures.In 2000, more than 300,000 vehicles used the interchange every day, far more than the 50,000-60,000 vehicles that it had been designed to carry.Since 2010, the interchange became subject to major repairs of the most heavily accessed ramps.