The first week of October brings a number of lane closures along I-35 and major roads in Round Rock. 1. I-35 will be reduced to one northbound lane between RM 620 and Westinghouse Road from 9 p.m.-6 a.m. on Sunday through Thursday night. Ramps will also be closed as necessary. 2. The north-to-south turnaround at Sam Bass Road and I-35 will be closed from 9 a.m. until 5 p.m. Monday. 3. The two outside lanes on I-35 will be closed on the southbound access road at Sam Bass Road from 8 p.m Tuesday until 5 a.m. Wednesday. 4. The north-to-south turnaround on I-35 at McNeil Road will be closed until Oct. 12. 5. On RM 620, there will be no access to or from Oakwood Boulevard until 5 p.m. on Friday. The Texas Department of Transportation is encouraging drivers to detour via Oaklands Drive or Oak Park Drive and Spring Hollow Path.