Contents of scenarios
Different effects of traffic are compared in the scenarios. The individual focus of a planning
process determines the set of measures and indicators to be used in the scenarios. Transport
policies which normally result in a transport masterplan must include all the basic
characteristics of traffic and the resulting effects. By means of selected indicators the estimated effects for each scenario can be assessed (table 7):
Table 7: Effects of traffic dealt with in the different scenarios (SAMMER, ROESCHEL 1995)
Determination of the impacts
With the help of the indicators, which were defined at the beginning of the policy formulation
process, each scenario can be described.
The impacts of each indicator in each scenario are determined and documented (shown in a
matrix, with figures, etc.). In the next step the respective impacts of all the evaluated indicatorscan be summarised in an evaluation of each scenario. In the final step the comparison of the resulting effects of each scenario leads to the final evaluation: a ranking of the scenarios .
Evaluation tools
Different assessment tools have been developed for the evaluation of the scenarios or
alternatives. Some examples of the most important are:
• CBA – Cost Benefit Analysis
• CEA – Cost Effectiveness Analysis
• MCA – Multicriteria Analysis
• SIA – Strategic Environmental Impact Assessment
• EIA – Environmental Impact Assessment
• Etc.