Optical Fibre Works In Progress (TC1265)The Optical Fibre Works In Progress (TC1265) traffic control sign is designed to inform motorists of optical fibre installation or maintenance works being carried out near the roadway. It provides clear advance notice for drivers to reduce speed and proceed with caution around sensitive worksites and equipment. Manufactured with super bright traffic yellow CL400 Class 1W reflective material, it ensures maximum visibility during both day and night