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Time dependence of traffic emissions in the urban area of Thessaloniki

1993; Elsevier BV; Volume: 134; Issue: 1-3 Linguagem: Inglês

10.1016/0048-9697(93)90357-c

1879-1026

K. N. Pattas, Nikolas Kyriakis, C. Nakos,

Air Quality and Health Impacts

Abstract The available traffic load data were evaluated and proved that three time zones with relatively constant traffic load can be identified. The driving patterns of the city as well as of the individual roads were derived, based on 1500 km of real time speed recordings. The driving patterns were derived on a 24 h basis as well as for each time zone with constant traffic load. Based on the mean speed of these driving patterns, on the emission factors experimentally determined from 580 passenger cars, the CORINAIR methodology and the vehicle fleet data for the area of Thessaloniki, mean annual emissions were calculated. The time dependence of the emission factors of each road (kg/km·h) was determined, using the same procedure and taking into account the traffic load data and the traffic load synthesis per hour.