Abstract: As being an effective real-time method of monitoring vehicle
emissions on-road, a remote sensing system based on the tunable diode laser
(TDL) technology was presented, and the key technologies were discussed. A
field test in Guangzhou (Guangdong, China) was performed and was found that the
factors, such as slope, instantaneous speed and acceleration, had significant
influence on the detectable rate of the system. Based on the results, the
proposal choice of testing site was presented.