On a slippery surface, you should not:

To ride safely on a slippery surface, you should use both brakes when slowing or stopping, reduce your speed, and avoid making sudden moves. Be alert to oily areas, dirt, gravel, shaded areas, and bridges, as these surfaces are more likely to be slippery than others.

• Reduce your speed.
• Avoid making sudden moves.
• Use only the front brake when slowing or stopping.
• Use both brakes when slowing or stopping.