Evaluation of energy saving measures in the transport sector : a review of efforts and certainty
(2009)
The EU Directive on Energy End-use Efficiency and Energy Services (ESD) set an indicative target for EU Member States to achieve a 9% annual energy saving by 2016 from new energy efficiency improvement (EEI) measures. Until now there has been no common methodology on how to measure and evaluate such savings. An international consortium funded by the Intelligent Energy Europe programme and co-ordinated by the Wuppertal Institute has developed harmonised methods for the evaluation of end-use EEI measures. The European Commission encourages Member States to prove energy savings with the help of these methods.
From the evaluation point of view, the transport sector is a special case. In the transport sector, data collection appears to be difficult. A number of values can be derived from existing national statistics, but sources have to be analysed in order to be operational. In passenger transportation, measures prevalently aim at changing mobility behaviour. Mobility behaviour depends on specific socio-economic and local conditions and might therefore vary considerably from measure to measure. Often, only surveys that are well-defined for certain conditions can generate appropriate data.
The paper discusses availability and certainty of data sources to be derived to evaluate EEI measures in passenger transportation. It first introduces two transport-related bottom-up evaluation methods for the transport sector. One aims at evaluating measures fostering vehicle energy efficiency. The other one aims at evaluating modal shifts. The paper then points to sources of corresponding data and the way the data have to be analysed. Thereby it demonstrates the trade-off between evaluation costs and the level of certainty. In so doing, it gives recommendations how to conduct the evaluation of transport-related EEI measures with keeping both efforts low and certainty high.
In 2008, transport accounted for 27% of the world’s total final energy consumption. Currently, we are facing a rapidly expanding transport sector with continually increasing energy consumption. In the future, emerging and developing countries especially will experience an accelerated growth in transport energy demand due to rapid population growth, urbanisation and rising per capita income. The transport sector’s inefficiency and its dependency on oil will become an economic burden for these countries. They will have to face increasing crude oil prices and uncertainties regarding energy security.
Thus, there is a need for an efficient transport system and particularly for decision makers in developing and emerging countries to have access to planning advice in order to identify suitable and effective measures for low-energy urban transport. To meet this demand, existing knowledge and measures about energy efficiency in urban passenger transport was compiled and a structured introduction to energy efficiency in transport is provided.
The main determinates of an energy-efficient transport system are explained and strategic approaches to increase energy efficiency are outlined. Success factors and barriers for energy efficiency policies are described. The main element of the paper is an overview of different energy efficiency policies and measures for the key actors in energy-efficient transport on local and national levels. A set of measures is assigned to each actor identified. The compilation was adapted to the circumstances in developing and emerging countries and includes examples for successful implementation of several measures. Thus, the document satisfies the need for a comprehensive introduction to energy efficiency in urban transport in developing and emerging countries.