Final answer:
Customs officers at the ASP utilize advanced scanning devices to check vehicles and their cargo holds for safety and legal compliance, including inspection of tires, stowaways, and animals.
Step-by-step explanation:
At the Automated Screening Port (ASP), customs officers inspect various items on a transport vehicle to ensure safety and compliance with legal standards. The inspection often includes the use of gamma ray, x-ray, or neutron-scanning devices to reveal the contents of trucks and cars. This advanced technology allows for a detailed examination of cargo holds, ensuring that there are no stowaways, illicit substances, or other prohibited items.
Items such as vehicles, including their rubber tires, are scrutinized for contraband or hidden compartments. Inspections also extend to things like water transportation methods, animals being transported, and ensuring nothing harmful is being introduced into the environment along trails and roadsides.