Road trip games are fun activities that travelers play to pass the time during long car journeys. These games can include classic options like I Spy, where players take turns spotting objects outside the vehicle, or 20 Questions, where one person thinks of something, and others ask yes-or-no questions to guess what it is. Many road trip games require no materials, making them easy to play anywhere. Other popular games include the License Plate Game, where players try to spot plates from different states, and The Alphabet Game, where participants find words on signs that start with each letter of the alphabet in order.