Abstract
Some safety programmes are more effective than others in improving safety performance at the project level. The effectiveness of safety programmes was evaluated by studying 70 construction projects in the Thai construction sector, examining the relationship between their actual status and associated site safety performance. The actual status was assessed by using an evaluation tool developed in compliance with Thai safety legislation and validated by safety experts. Safety performance was assessed by using reactive and proactive measures. Particularly, the accident rate was used as a reactive indicator, while the unsafe act index and the unsafe condition index were used as proactive indicators. The results demonstrated that safety performance was influenced by the nature of implemented safety programmes. First, safety programmes which positively affect accident rates include accident investigations, jobsite inspections, control of subcontractors and safety incentives. Secondly, five programmes, namely jobsite inspections, accident investigations, job hazard analysis, safety committees and safety record keeping, were found to have the most contributions to fewer unsafe acts. And thirdly, accident investigations, jobsite inspections, job hazard analysis, safety inductions and safety auditing were the most effective programmes in reducing unsafe conditions.
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