The recommended slope for straight ramps in situations such as:
Half deck car parks where the vertical separation between decks is less than 1.5m, is 1:6. This relatively steep slope is only possible when using transition gradients top and bottom.
Where vertical differences are greater than 1.5m, is not less than 1:10.
Where ramps are curved, 1:10 or 1:12 depending on the separation.