to identify the vehicles that emit excessive smoke. Record the plate numbers of vehicles that cause severe pollution and write down the time and place of occurrence. Photos should be taken to be used as evidence. Input the plate numbers that have been recorded and enquire online about the registration of these vehicles. Then notify the owners of these vehicles to bring them to the stations to be examined.

Non-load sudden acceleration test (Methods and Procedures for Testing Smoke Emission of Diesel Vehicles) Advantages: mobile, convenient; it can be used at road blocks or at station inspection. Disadvantages: since the test is conducted while the vehicle is in neutral mode, it is impossible to simulate road driving. Full-load fixed rotation test (Methods and Procedures for Testing Smoke Emission of Diesel Vehicles)
Advantages: Simulation on road driving can be done. Disadvantages: It is not mobile, not convenient, because the cars must be brought to the stations.

The public can give, through telephone or the Internet, the information about vehicles that emit excessive smoke to the authorities.
Input the recorded plate numbers to enquire online about the registration information of these vehicles and notify the owners of these vehicles to bring them to the stations to be examined.

1. CNG bus

2. Electric bus

3. Hybrid bus