Changed Traffic Conditions (T1-23)The Changed Traffic Conditions (T1 23) sign warns motorists that the road layout, traffic flow, or conditions ahead have recently changed, helping drivers to slow down, stay alert, and navigate safely. It is commonly used in construction zones, temporary detours, and areas with modified traffic patterns. Manufactured from yellow CL400 Class 1W reflective material, the T1 23 ensures excellent visibility during day, night, and in all weather conditions,