12580 how to query the road speedometer?

12580 can't query the road speedometer, so you can only pay attention to the sign next to it when driving.

12580 is an integrated information service platform provided by China Mobile. All parts of the country can call 12580 at any time to inquire about catering, entertainment, tourism, weather, transportation, convenience and other information, as well as hotels, air tickets and other information, and the inquiry results will be informed to customers through voice, SMS and MMS.