FIA president Jean Todt says he will only consider closed cockpits in Formula One once he is certain it would not come with additional consequences.
Calls for closed cockpits to be introduced in open wheel racing increased last year following the death of IndyCar's Justin Wilson, who was struck by a loose piece of debris in an August race. It came just weeks after former Marussia driver Jules Bianchi succumbed to the severe head injuries he suffered at the 2014 Japanese Grand Prix following a collision with a recovery vehicle.
Since Wilson's death the FIA has been looking into three cockpit protection solutions but there are lingering concerns about driver visibility and the impact such designs would have on a swift exit from a car.