Used to stop dangerous lane changing and make driversobserve barrier lines. The material used is so flexiblethat even if traffic has to pass over it, there is no damage either to vehicle or to the lane divider and it quickly restores its original state.It has reflective tapes or reflectors or glass beadswhich guide the motorist during night time. It comes in two types, one in low height also known as flap delineators or flap lane dividers and the other is in high post form starting from approx. 300 mm to 1100mm height. It is also known as spring post or flexible post delineator.