Access to Hawthorne Boulevard opens Wednesday, Aug. 7, during Phase IV of the roundabout project at Hawthorne Boulevard and Business Highway 13. Tractor-trailers and semitrailers are being detoured and left turns from Hawthorne Boulevard onto southbound Business 13 and left turns from southbound Business 13 onto Hawthorne Boulevard are prohibited during this phase of the project. Construction on the islands east and west of the center circle has been completed and the islands to the north and south are still being constructed. Construction of the truck skirt and center circle is underway. The project is estimated to be completed later in August.