Upper deck of southbound I-35 downtown closing permanently Tuesday night

AUSTIN (KXAN) -- The upper deck of Interstate 35 southbound in downtown Austin will close permanently starting Tuesday night, the Texas Department of Transportation said in an update.As the I-35 Capital Express Central Project is transforming the section of the interstate that runs through downtown, one update that brings big traffic impacts will begin Tuesday night.The upper deck of I-35 on the southbound side will permanently close Tuesday at 9 p.m. as part of the current phase of construction