www.curacaoproject.eu                      CURACAO - coordination of urban road-user charging organisational issues                   Funded by the EU

Road Pricing Context

OBJECTIVES

SCHEME DESIGN

TECHNOLOGY

BUSINESS SYSTEMS

Prediction

PREDICTION

TRAFFIC EFFECTS

ENVIRONMENT

ECONOMY

EQUITY

Appraisal

APPRAISAL

Decision Making

ACCEPTABILITY

TRANSFERABILITY

Implementation and Evaluation

EVALUATION

IMPLEMENTATION

Case Studies

Bergen

Bologna

Bristol

Cambridge

Durham

Dutch National Case

Edinburgh

London

Manchester

Milan

Nord-Jaeren

Oslo

Rome

Stockholm

The Hague

Trondheim



Urban Road User Charging Online Knowledge Base

To What Extent Can We Appraise Individual Scheme Objectives?

Table 11 1 assesses the ease with which each of the objectives listed in Chapter 2 can be appraised. It does so by considering in turn whether it can be measured, predicted and valued. The table draws a distinction between three groups of objective:
• those which can be readily measured, predicted and valued, including congestion relief, safety and revenue raising;
• those where measurement is possible, but prediction and hence valuation remain problematic: environment and economic growth; and
• the other four objectives, for which problems in measurement make the subsequent stages difficult.

Objectives that are more qualitative in nature can still be appraised, but are better suited to Multi Criteria Appraisal as discussed previously in Section 11.3 above. However, they still require a basis for reliably indicating, albeit in qualitative terms, the impact of a road user charging scheme on them.

Equity as an objective poses particular problems because, as noted in Chapter 10, it is the disaggregate effects on a range of impact groups that are important, rather than some aggregate indicator of distributional effects. This means that the individual groups have to be identified, the impacts on them predicted, and some means adopted for assessing the significance of those impacts. While there is current advice in the UK (DfT, 2008) recommending the use of social research methods to appraise equity impacts, the appraisal of equity impacts is still fraught with difficulties. Appendix E provides a summary of the appraisal of equity impacts as recommended in DfT (2008).

Objective

 

Easy to measure?

 

Easy to predict?

 

Easy to value?

 

Congestion relief

 

Yes

 

Yes

 

Yes

 

Liveability

 

No

 

No

 

No

 

Health

 

Limited

 

No

 

No

 

Equity

 

Limited

 

No

 

No

 

Safety

 

Yes

 

Yes

 

Yes

 

Environment

 

Yes

 

Limited

 

Limited

 

Economic growth

 

Yes

 

Limited

 

No

 

Future generations

 

Limited

 

Limited

 

No

 

Raising revenue

 

Yes

 

Yes

 

Yes

 


No information on this theme is currently available from the case studies