Speed-measuring and snapshot bayonet equipment, snapshot function, speeding, drivers and passengers not using seat belts according to regulations, dialing and answering hand-held phones while driving, smoking while driving and other behaviors that hinder traffic safety, the speed limit is 40 kilometers per hour.

Some have speed measurement, and some have no speed measurement. This is not absolute. Generally, this kind of toilet will have obvious hints. If there is no obvious hint, there is basically no speed measurement.