No Lines Do Not Overtake Unless Safe (T3-12)The No Lines Do Not Overtake Unless Safe (T3 12) traffic control sign is designed to warn motorists that lane markings are missing or incomplete and to exercise caution when overtaking. Manufactured with super bright traffic yellow CL400 Class 1W reflective material, it ensures excellent visibility during both day and night, reminding drivers to overtake only when conditions are safe. This sign is available in 900 x 600 mm and 1200 x 900 mm sizes, and