HM4-TMS Calpella CMS 26/27

Caltrans District 1 in Eureka is planning the HM4-TMS Calpella CMS 26/27 project to replace obsolete Changeable Message Sign systems on State Route 101 in Mendocino County, specifically at postmile 29.8 and postmile R31.6. The scope of work includes the replacement of CMS systems, wiring within existing conduits, cabinets, controllers, and other associated cabinet components. The primary objective is to replace assets that have reached the end of their lifecycle or are in poor condition using current industry-standard equipment to enhance the operational efficiency and reliability of the traffic management system for the benefit of the traveling public. All project activities will be confined to the existing State right-of-way. The project is classified as a categorical exemption under Class 1 of the California Code of Regulations, title 14, section 15301, as it involves the maintenance of existing facilities without significant environmental or historic impact. This forecast project is associated with NAICS code 237310 and was processed with a signature date of July 29, 2026, by the lead agency, DOT Caltrans.