No Lines Do Not Overtake Unless Safe (T3-12)The No Lines Do Not Overtake Unless Safe (T3 12) sign is used to warn motorists that a section of road has no line markings and overtaking should only be attempted with extreme caution. This sign is commonly installed on newly resurfaced roads, temporary detours, or roadwork areas, where line marking has not yet been applied. Manufactured from yellow CL400 Class 1W reflective material, the T3 12 ensures maximum visibility both day and night, and in