How does the maximum permissible quantity of dangerous goods by air compare to other modes of transportation?

The maximum permissible quantity of dangerous goods by air is significantly more restricted compared to other modes of transportation, such as ocean and truck transport. This is primarily due to the heightened safety concerns associated with air travel.

Air transport faces stricter regulatory standards because the risks of fire, explosion, or toxic exposure can have catastrophic consequences in the confined space and operational environment of an aircraft. The International Air Transport Association (IATA) and the International Civil Aviation Organization (ICAO) impose stringent guidelines to limit the amount and types of dangerous goods that can be transported by air to mitigate these risks.

In contrast, while truck transport and ocean transport have their own regulations, the scope for carrying larger quantities of dangerous goods is generally broader. This difference reflects the varying levels of risk management and safety considerations for each mode. Therefore, the restrictions in air transport are more pronounced, which supports the assertion that it is significantly more restricted.