Suitable hedge to slow run away cars. We suggest using yew as a suitable hedge to slow run away cars. Ideally using yew planted three to the metre. Also you could build a fence in the hedge of steel tubing such as scaffolding tubing which the hedge would grow around and add additional support and strenght to the hedge. plus with yew over a number of years the stems of the yew would become quite thick and strong. In the Autumn and winter it is possible to buy yew at a large side at a reasonalble cost