Staff ReportAdvance News JournalPHARR — There are some upcoming closures starting today that will shake up traffic flow. The closures are related to construction activities for the I-2/I-69C Interchange Project, a release by Dragados-Pulice Joint Venture said.The I-69C southbound frontage road that lies between SH495 and I-2 is set to be closed nightly. The closures will start today, Jan. 29, through Thursday from 8 p.m. to 6 a.m. In addition, the Jackson Road underpass at I-2 will close today through Sunday from 8 p.m. to 6 a.m.On a daily basis, from 9 a.m. to 4 p.m. starting today until Friday,