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This article reviews the latest and relevant work on both vehicular emission models and driving cycles. The three main types of emission models, namely emission factor models, average speed models and modal models, are covered. Each project is analysed regarding its characteristic parameters, such as data collection technique, methodology, statistical analysis and pollutants covered, where appropriate. Other parameters were taken into account, such as the project objectives, results and relevance regarding the wider spectrum of the road traf c situation.