What is the function of ABS brakes?

The options are not shown, since this is one of the 1,000 paid questions.
Buy all 1,000 questions now »

Many cars have an anti-lock braking system, i.e. ABS […] on gravel, snow and ice, the braking distance can be slightly longer.” (Driving Licence Book, 19th Edition, page 131)

Useful links:

Buy all 1,000 questions in English for car (category B)