This includes high speed racing, performing hand brake turns in car parks, or off-road riding on motorbikes.

BBC: 'Boy racers' could have cars seized

Indeed, the prototype has a distance-keeping system that will brake to a standstill, and move off again when the car in front moves.

ECONOMIST: Motoring

To win the leadership, Ms Davidson, who said too many see her party as "a brake on the aspirations of Scotland and not a torch-bearer", saw off a challenge from the party's then deputy leader, Murdo Fraser.

BBC: Ruth Davidson: Voters don't trust Tory motives

Both drugs turn off a natural brake on immune system activity called CTLA4 (cytotoxic T-lymphocyte antigen 4).

FORBES: Magazine Article

Make sure a technician tops off the windshield-wiper fluid, changes the oil and checks the brake fluid before you depart.

FORBES: Magazine Article

The antibodies bind to the CTLA-4, found on a cell's surface, and shut off the brake.

FORBES: Magazine Article