What kind of accident is about to happen?

A worker is performing repairs on a water catchment square (60 x 60 x depth 66 cm) at a site where pavement work is being done. A roller is performing surface compaction in the same area. Can you predict what's about to happen?

Look what happened!

The roller operator did not notice the worker in the water catchment square. Another worker yelled out to warn him and signaled him to stop, but the rear tires of the roller ran over the top of the worker in the water catchment square.

Tips for preventing similar accidents
1.	Do not undertake multiple projects in the same location.
2.	If multiple projects must be undertaken in the same location, take safety measures such as the following, and be sure that everyone is aware of them: a) Avoid performing work at the same time. b) Divide and set up barricades between work areas.
3.	Assign someone to serve as a guide in areas in which the work areas are close to one another.

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