Speed is made even more extreme because it is without brakes. In fact, one of the peculiarities of tobogganing is that it doesn't have a braking system, the same is true for the skeleton while in the bobsleigh the brakes are there but they can only be applied after the finish line.

No, competitive luge sleds do not have mechanical brakes. In the context of the Winter Olympics, athletes racing at speeds exceeding 90 mph (150 km/h) must rely entirely on their bodies and the sled's design to slow down. To steer and maintain control, lugers use subtle movements, such as shifting their body weight, applying pressure with their calves against the sled's "runners" (kufen), or pulling on the handles. The only way to truly stop after crossing the finish line is to sit up to create air resistance and then use their spiked gloves to "paddle" against the ice, eventually transitioning onto an uphill section of the track designed to naturally bleed off speed. This lack of brakes is what makes luge one of the most dangerous and adrenaline-fueled sports in the world, as once the athlete begins the descent, they are committed to the gravity-driven ride.