F1 halo can withstand weight of double-decker bus

LONDON — Formula One’s new driver head-protection “halo” device is so robust that it can take the weight of a double-decker bus, according to Mercedes’ technical head James Allison. “This is not a light piece of work, it is several kilograms of titanium that need to be put on the car,” the Briton said in a video on the world champions’ website explaining one of the season’s big novelties.