Discussion
The benefits of Anti-lock Braking Systems (ABS) are all, except :
Answer: D
The item that is not a benefit of ABS is longer skid marks on rough roads.
An anti-lock braking system senses when a wheel is about to lock and rapidly modulates the brake pressure, keeping the wheels rotating at the limit of grip. This keeps directional stability and lets the driver steer during hard braking, and on most surfaces it shortens or maintains the stopping distance.
Because the wheels do not lock, ABS braking usually leaves faint, intermittent marks rather than the dark, continuous skid marks of locked wheels. That matters in accident reconstruction, since speed estimates based on skid length are harder to make for ABS vehicles. Longer skid marks are not a benefit.
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