According to Wiki:
A chicken bus (Spanish: "camioneta") is a colloquial English name for a colorful modified and decorated US school bus and transit bus that transports goods and people between communities in Honduras and Guatemala. The word "chicken" refers to the fact that rural Guatemalans regularly transport live animals on such buses, a practice that visitors from other countries often find remarkable. The buses are also commonly used in Nicaragua, El Salvador, Panama, and Costa Rica.
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