As for assuming responsibility for work site safety by contract, the standard AIA construction form contracts (produced ... including posting danger signs and other warnings ‎against hazards; ...

Signs alerting of potential presence ... methods needed for the protection of employees. Construction site and facility safety focuses on conducting and documenting a risk assessme ...

signs of roadworks taking place. But just because there is a lot of construction work does not mean that construction companies should push for speed at the expense of safety and doing a good job.