Make sure all stakes on a construction site are capped with coloured safety caps.
This is probably a requirement in many countries. It obviously reduces the risk of injuries, and it makes stakes easier to find. Health and safety inspectors may fine your company if they find stakes not capped.
It’s not a difficult task. Packs of the caps can be bought and put on site ready for use.
This is usually a task the construction contractor will do, but if you are running a smaller project, if you are the project manager you should check they are capped.