Cal-Trans Crews are set to begin work on a ½-mile-long project to construct retaining walls and concrete barriers near Scotts Valley, just north of Santa’s Village Drive to Crescent Drive. That work is slated to begin this Monday, the 31st. The roadwork will consist of alternating lane closures, and up to 15-min delays are expected. Weather permitting, the work will be completed by spring, 2012.