In his book "In Search of King Solomon's Mines," author Tahir Shah highlights a unique cultural norm encountered while traveling on Ethiopian buses. He notes an unwritten rule that requires passengers to keep the windows shut during the journey, which might seem unusual to outsiders. This practice not only affects the comfort of travelers but also reflects deeper cultural and environmental considerations in the region.

Shah's observation serves as a lens through which readers can understand the intricacies of Ethiopian travel customs. By adhering to this rule, passengers may be adhering to social expectations or attempting to mitigate the challenges posed by the outside environment, underscoring the interplay between local traditions and the travel experience.