Research Article

Sustainable Highway Design: Disentangling the Effects of Geometric-Related and Traffic-Related Factors on Urban Highway Traffic Emissions

Table 2

The influencing factors of traffic emissions.

CategoryType of factors

Vehicle characteristicsVehicle type, year of manufacture, mileage, fuel supply system, emission control systems
Fuel parametersFuel type, oxygen content, sulfur content, volatility, density
Operating conditionsStartup mode, speed, acceleration, excess air ratio, load, road geometry, type of signal control, driving behavior
Operating environmentAmbient temperature, relative humidity