You can learn about high speed by watching TV programs.
3. You can inquire through the car broadcast.
You can also keep abreast of the high-speed situation through WeChat. Open WeChat, and search WeChat official account in WeChat official account, the traffic police in your province.
Expressway refers to a highway dedicated to high-speed driving of automobiles. Expressway has different regulations in different countries and regions, different times and different scientific research and academic fields.