Paving can become slippery if algae grows on it – this is encouraged if there is no ‘fall’ to allow water to run off the surface. Planning decisions may include using rough or textured surfaces where the paving is in shade, or using a porous surface such as gravel instead.
Uneven surfaces made up of two or more materials can create ‘toe catchers’ which can lead to trips. Planning can include avoiding such surfaces, or ensuring that they are level.
Steps can be a tripping hazard in the dark or if they are uneven in height or too steep. Planning decisions can include making sure that the steps are suitable for the gradient, including handrails or adding lights to the side of the risers.