Remote Controlled Road Cleaning Vehicle

Guidance note about on - road vehicle emissions remote sensing

Singapore Road Vehicle Fleet Evolution

Vehicle fleet modeling is a useful tool to analyze the dynamics of motor vehicles and their environmental impact at a macroscopic level, and has been applied in the USA and Europe. In this article, a road fleet model is constructed for the city-state Singapore. Policies that control vehicle ownership and congestion road pricing employed since 1998 differentiate Singapore’s vehicle market from o...

A tunable diode laser system for the remote sensing of on-road vehicle emissions

A tunable infrared laser differential absorption spectrometer (TILDAS) has been developed to measure airpollutant emission from on-road motor vehicles. The system uses a monostatic source–detector platform and a retroreflector. It has been shown to be able to measure the emissions from individual vehicles at highway speeds. Excellent detection sensitivity is obtained with measurement precision ...

On-road Remote Sensing of Vehicle Emissions in Monterrey, N.l. Mexico

Mexico to monitor remotely the carbon monoxide (CO), hydrocarbons (HC) and nitric oxide (NO) emissions of the local vehicle fleet. In four days of monitoring at four different locations within the city, 26,534 vehicles passed the sensor. In all more than 24,000 valid measurements were obtained for CO, more than 23,000 for HC and more than 16,000 for NO. Mean values for each species were 1.69% C...

Characterization of On-Road Vehicle NO Emissions by a TILDAS Remote Sensor.

A tunable infrared laser differential absorption spectrometer (TILDAS) was used to remotely sense the nitric oxide (NO) emissions from 1,473 on-road vehicles. The real-world measurement precision of this instrument in the limit of low NO concentration is 5 ppm of the vehicle exhaust, which corresponds to a 3o detection limit of 15 ppm. Our analysis of the distribution of negative concentration ...