Abstract
This article explains the data analysis of onboard measurement using two sets of motorcycles of 1000 cc and 600 cc engine size. Characteristics of instantaneous emissions with time, speed and acceleration have been investigated on the air quality management area in Edinburgh. Average emission factors for CO, HC and NOX along the corridor have been estimated based on time (g/s) and distance (g/km). Because emissions are primarily affected by speed, therefore a correlation between emission factors and speed has been developed. Using onboard emission measurements, emission can be classified into different vehicle operating modes (idling cruise, acceleration and deceleration). Therefore, models have been developed between time spent in these modes and emission. These types of models are suitable, in evaluation of ramp metering, signal coordination and widely used in ITS.