Several main roads closed after a tanker carrying potentially hazardous chemicals spilled some of its load.

Proximate causes:
• Improperly prepared equipment
• Inadequate engineering/design
• Improper handling of materials (the chemical had leaked from the tanks which were not properly secured)

Source: A web-based collection and analysis of process safety incidents (https://www.sciencedirect.com/science/article/abs/pii/S0950423016302285)
Image Credit: Dave Himelfield