Did ancient carriages have brakes? Otherwise the downhill carriage will soon run faster than the horse?

The driving part of ancient cars consisted of wheels and axles. Axle is a component that fixes wheels, carries carriages and transmits power. The axle is perpendicular to the ground. The fixing method is to install two wooden boards at the bottom of the ground and tie the axle to them with a rope, which is called "V". Because it looks like a prone rabbit, it is also called a "lying rabbit". At the center of the wheel is a log with a hole, called "wheel hub (G incarnation)", which is used to pass through the shaft. Both ends of the shaft are exposed outside the hub, and the end of the shaft is covered with a bronze or iron shaft head, which is called "wèi". There is a hole in the axle to accept the "control" to prevent the wheel from falling off. The jurisdiction is mostly made of bronze or iron, flat and long, commonly known as pin. The frame of the wheel is called "rim". Rim and hub are connected by spokes. The spokes of ancient vehicles in China were generally 30. All spokes are concentrated on the hub, which is called "C 22U".