Which of the safety systems applied in buses is responsible for the most effective method of braking?
Show the correct answer
Correct answer
C. The anti-lock braking system (ABS).
Explanation
In the photo you can see the instrument panel of a bus, and arrows point to several warning lights, including the ABS warning light and the stability system warning light. The anti-lock braking system (ABS) is responsible for more effective braking - answer C.
The Road Traffic Act requires a vehicle to allow easy and reliable use of the braking controls. ABS makes sure that the wheels do not lock under hard braking: when a wheel starts to lock, the system reduces the pressure in its brake for a fraction of a second and then increases it again. Thanks to this, the bus can still be steered, and on most surfaces it brakes more effectively than with locked wheels. The electronic stability control system (answer A) prevents skids and rollovers on bends, and the traction control system (answer B) limits wheel spin when moving off and accelerating - both are useful, but they are not responsible for braking.
Legal basis: Art. 66 para. 1 point 5 of the Road Traffic Act (Prawo o ruchu drogowym)