Abstract: As improved collapsible bollard is disclosed to control vehicular traffic. The present invention is comprised of a base that has at least one bore, a carriage having at least one bore that corresponds to the bore in the base. There is at least one impact release insert. The impact release insert is seated in the bore of the base. A fastening means is used to secure the impact release insert and the carriage to the base. A sleeve is removably fastened to the carriage. The sleeve has a free floating insert lock, a bias means, and a pulley system. The bias means of the sleeve is positioned to cause a downward bias against the free floating insert lock. The free floating insert lock is attached to the pulley system such that said pulley system is able to move the free floating insert lock in a direction that is opposite to the bias means. In the event the present invention is struck extremely hard, the sleeve will shear from base and the sleeve will typically be unharmed mechanically.