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Correct!

How will anti-lock brakes improve your vehicle's safety?

They allow you to follow other vehicles more closely
They help you keep steering control while braking heavily
Correct answer
They let you drive faster on wet roads
They allow you to brake later than normal

DVSA theory test explanation

When your steering wheels are locked - as can happen in a skid - you cannot steer the vehicle. Anti-lock brakes help you to keep steering control while you're braking heavily, but they're not a substitute for good forward planning. Anticipation and planning ahead will minimise the risk of skidding more effectively than relying on your braking system.

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