Abstract: A supporting frame for use on motor vehicles for supporting highway traffic markers of the type having a flat square base and an elongated brightly colored cone extending vertically therefrom (commonly called traffic cones). The supporting frame is characterized by its ability to be installed on the vehicle in almost any position, e.g., horizontally or vertically. The frame comprises rectangular box-shaped framework having an interior shape fitting the periphery of the square bases of the traffic cones. The frame is open at one end for insertion and removal of traffic cones and has two open sides facilitating removal of said traffic cones. The supporting frame has a ring spaced from the base portion thereof and supported on supporting rods. The ring supports the cone portions of the traffic cones and also provides a point of attachment for the supporting frame to the structural member of the vehicle.