A lane closure is planned for northbound traffic on Sunset Boulevard around Butler Creek today and tomorrow to allow consultants working on the design of the bridge rehabilitation project to complete geotechnical cores. The lane will be closed beginning at 8:30 a.m. and will reopen at 4 p.m. each day. A single lane closure is anticipated, with traffic being flagged through the remaining lane. Motorists should expect brief delays in the area.