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On the over- and underestimation of impacts from individual passenger transport at different assessment scales

Transport is understood to be a major cause but also one of the main mitigation options for climate change. Both, conventional as well as low-carbon transport equipment has been subject to numerous environmental assessments. However, several shortcomings of such technology assessments have been identified by scholars, which can lead to considerable divergence between the estimated and the real environmental impact of transport equipment. These discrepancies can lead to false optimism about technology choices. Eliminating errors in technology assessments therefore is indispensable in order to steer the transport sector into a future that is compatible with climate change mitigation targets, such as the 2C target. This work is therefore concerned with consolidating and integrating these factors into an overall assessment framework in order to overcome several shortcomings of previous environmental assessments of individual passenger transport equipment.