Months of roadworks are on the way at the intersection of Jon Sanders Drive, Powis Street, and Harborne Street in Glendalough. Months of roadworks are on the way at the intersection of Jon Sanders Drive, Powis Street, and Harborne Street in Glendalough. The project will completely redesign the traffic signals at the intersection of Jon Sanders Drive, Powis Street and Harborne Street. Additional lanes will be added to Jon Sanders Drive and Powis Street, while traffic signal phasing will also be updated. Camera Icon Approved plans for the upcoming upgrade to the intersection of Jon Sanders Drive, Powis Street, and Harborne Street in Glendalough.