Determining a constructor's responsibility when a pedestrian is injured near a job site involves legal considerations that are beyond the scope of provided safety data sheets. However, here are some general safety measures that construction sites can take to minimize the risk of incidents involving pedestrians:

• Proper signage and barriers: Clearly mark construction zones with signs and physical barriers to keep pedestrians out of harm's way.
• Securing the area: Implement measures to prevent unauthorized access to the site [1].
• Good housekeeping: Maintain a clean and organized site to reduce trip and fall hazards [2], [3], [4], [1].
• Proper training: Ensure that all workers are adequately trained in safety procedures and hazard recognition.
• Ventilation: Ensure good ventilation and exhaustion at the workplace [2], [3], [5].

Liability will depend on the specific circumstances, including adherence to safety regulations, the presence of negligence, and local laws.