What type of ammunition can buses legally carry?

Buses are allowed to carry small arms ammunition that is labeled ORM-D, which stands for "Other Regulated Materials-Domestic." This classification indicates that the ammunition is considered to present a lower risk during transport and is thus subject to less stringent regulations. The ORM-D label signifies that the materials are being shipped within a domestic context and typically includes items that are non-hazardous under normal transportation conditions, such as small arms ammunition intended for civilian use.

The regulations surrounding the transportation of ammunition are designed to ensure safety for passengers and the public while allowing necessary materials to be transported under controlled conditions. High caliber ammunition and military-grade ammunition generally fall under more stringent regulations and may not be transported by standard public transit buses without specialized permits. Furthermore, while buses might have the ability to carry ammunition with proper authorization, that would typically not include any type that is not specifically labeled as ORM-D. Therefore, small arms ammunition with ORM-D labeling remains the only type permissible under standard bus regulations.