What is the most common mode of hazardous material transport?

The most common mode of hazardous material transport is through highways. This method is preferred for several reasons, primarily due to its accessibility and flexibility. Highways allow for the direct movement of hazardous materials to and from various locations, including warehouses, manufacturing plants, and retail sites.

Transporting hazardous materials by highway is more efficient for shorter distances, which is often the case for many shipments. Additionally, the infrastructure for road transportation is typically more developed, allowing for a wider network of routes and access to urban areas where hazardous materials may need to be delivered.

While railways, airways, and waterways also play significant roles in hazardous material transport, they are utilized under more specific conditions, such as the need for bulk transport over longer distances or when certain industry standards dictate their usage. This means that, overall, highways represent the most prevalent and versatile option for hazardous material transport.