Ninth Street will be closed at Walnut Street from 7 p.m., Friday, Sept. 5, to 5 a.m., Monday, Sept. 8; as crews install streetcar track through the intersection. As a result, the Main Library pickup window will be inaccessible all day Saturday and Sunday due to road construction. There will be a temporary book drop installed at Vine and 9th streets. Pickup window holds will not expire on Saturday or Sunday. Holds may be rerouted to another location or may be picked up inside the building. Walnut Street will remain open, but lanes will be restricted.