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Hitchhikers use physical gestures or displays to indicate they need a ride. In some countries, the hitchhiker's hand is held with the palm facing upwards ✋, while in others, the index finger is used ☝️.
In 1971, drivers invented methods to communicate with hitchhikers during the Vietnam War 🇻🇳. They could tap on the roof of their vehicle or point at the ground to indicate their destinations.
