8. Brakes (overall sketch and operating sketch)
8.1. Service braking system
8.2. Secondary braking system
8.3. Parking brake
8.4. Any additional braking device(s) (and especially retarder) ...
8.8. Calculation for the braking system (determination of the ratio of the total braking forces at the circumference of the wheels to the force applied to the braking control) ...