Today, the Texas Department of Transportation’s contractor will reopen the new I-45 southbound entrance ramp located south of State Highway 75 and FM 1791. This effectively completes the reconstruction and relocation of all the entrance and exit ramps in and around Huntsville. The contractor will also shift traffic on the southbound I-45 frontage road to the inside lane in this area to allow for reconstruction of the outside lane. The outside main lane of southbound I-45 between Exit 118 and Exit 116, north of State Highway 30, was reopened last week. It had been closed since April to build the new ramp.