Urban Road User Charging Online Knowledge Base
What The Research Gaps?
The transferability of road pricing schemes is an area that has generally been under-researched, at least partly due to the limited opportunities that have existed previously to compare expectations with actual outcomes. The range of work covered in this chapter suggests that most considerations of transferability issues to date have been very informal, lacking both scope and structure. The exception is the emerging area of work from Rose and TRANSPLUS that has been taken a little further within SPECTRUM.
Future research needs to cover transferability of both predicted and actual outcomes of road pricing systems. It also seems likely that a simple methodology which focuses on issues that are likely to be appreciated as useful by end users will prove best.
Following on from the review work of the SPECTRUM project, it would perhaps be interesting to adopt an ex-post assessment of how experience gained in London may have transferred to Stockholm and how it may be impacting upon other cities considering road pricing schemes.
It may also be useful to distinguish key issues that affect transferability in the context of urban road pricing schemes, such as:
• the attributes of people and their perceptions;
• the nature of the public transport system;
• the nature of the road system and traffic;
• political perspectives and engagement; and
• forms of institutions and governance.
This chapter has summarised previous work undertaken to explore the transferability of experience of the real and synthesised outcomes of transport innovations from one situation to another. It has identified that the theme of transferability is significantly under-researched and that it has a dual identity, being both a technical theme (to improve understanding of the features that underlie success and failure) and a high level objective (to maximise the success of achieving desired outcomes by learning from experience). Transferability has implications for all the other themes considered in this report, but the closest link is with prediction because this is where the performance of road pricing scheme proposals is assessed taking account of relevant features, potentially making use of relationships transferred from other situations. There is also a clear link to the interface between prediction and evaluation, as understanding the reasons for discrepancies between predicted and actual outcomes of a road pricing scheme may be extremely valuable for informing the development of future proposals.
No information on this theme is currently available from the case studies