Line Marking Ahead (T1-15)The Line Marking Ahead (T1 15) sign warns motorists of line painting or road marking activities taking place ahead. This sign helps reduce accidents by encouraging drivers to slow down, avoid freshly painted lines, and proceed with caution around work crews and equipment. Manufactured from yellow CL400 Class 1W reflective material, the T1 15 provides outstanding visibility during the day, at night, and in adverse weather, making it ideal for roadwork