The Texas Department of Transportation will complete final construction on the new northbound ramps on and off I-35 on Aug. 23. According to a statement from TxDOT and the city of Round Rock, contractors will be milling, paving and restriping so that the existing ramps can be closed and the new ramps can be open on I-35 between Hwy. 79 and FM 3406. The work is scheduled to begin at 8 p.m. Sunday, Aug. 23. After the work is complete, the new northbound entrance and exit ramps will be opened, and the old ramps will be closed. Also, according to TxDOT, the new I-35 soutbound entrance ramp just north of Hwy. 79 will be opened and the existing one will be closed as well.