a traffic barrier delineator apparatus configured for being removably placed through a horizontal hole in a traffic barrier is described . the apparatus is made from plastic and is hollow with a retainer that will retain it in the traffic barrier hole . it is collapsible and will bend if hit by traffic . the apparatus is reusable and replaces industry standard adhesively attached traffic barrier traffic markers . this apparatus allows installation in traffic barriers that have screens or panels on top . this apparatus is far more visible to traffic with various reflective configurations and will not be incidentally dislodged during construction activities . applications include temporary traffic barriers such as k - rails or jersey rails , where existing horizontal holes allow the apparatus to be quickly slid into without entering live traffic . traffic barriers with and without horizontal holes can be retrofitted for this apparatus .