Nowadays, more and more people choose to travel by public transportation. The city's public transportation is flexible and convenient, making people's travel more intelligent and simple. However, behind this convenience, the safety and stability of the transportation system must be guaranteed. The harsh environment of the traffic and strict temperature requirements are factors that we should pay attention to when applying embedded technology, otherwise the consequences will be disastrous. Polyhex uses industrial-grade embedded boards that can withstand the extreme temperature and shock in the transportation field. At the same time, industrial flash memory is used to ensure information security, avoiding data loss or slow operation and providing safe, reliable navigation, control, and intelligent user terminals.