Cost-benefit assessment on composite traffic in Helsinki

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Cost-benefit assessment on composite traffic in the Helsinki metropolitan area evaluates operational costs, health costs, and carbon dioxide climate costs in a hypothetical situation where a part of private car traffic is replaced by composite traffic in 2005.

Scope

Purpose

What are the operational costs, health costs, and carbon dioxide climate costs in a hypothetical situation where a part of private car traffic is replaced by composite traffic in 2005? The part that is replaced varies from 0 to 100 %.

Boundaries

Temporal: One typical working day in 2005.
Spatial: Helsinki metropolitan area
Impacts:
- Capital and operational costs
- Health costs due to mortality caused by fine particle emissions.
- Climate costs due to carbon dioxide emissions.

Scenarios

The fraction of composite trips of all trips varies from 0 to 100 %.
Composite traffic does not have interactions with the demand of public transport.

Indended users

City-level decision-makers in Helsinki, the neighbouring municipalities, and elsewhere.
Helsinki Metropolitan Area Council
The Ministry of Transport

Participants

Jouni Tuomisto, Marko Tainio from KTL

Definition

Decision variables

Passenger level: whether to choose a private car or composite traffic (the decision by a random passenger)
Societal level: the target fraction of composite traffic from all trips that used to be private car trips. The amount of subsidies needed for composite traffic to reach the target is estimated based on costs to a passenger.

Indicators

Societal costs of personal trips in the Helsinki metropolitan area

Other variables

Indices

Hma_area (used as both origin and destination)
Hma_zone
Period_1
Output_1
Vehicle_1
Length_1
Comp_fr

Result

Results

The results are publised as a scientific article^[1]

Conclusions

45-60% composite fraction is optimal
Composite traffic reduces pressures typically by 50-70%
Composite traffic is more attractive to those with long (>= 5 km) trips
Total societal VOI is 30000 euro/d, which implies robust conclusions

References

↑ Tuomisto and Tainio: An economic way of reducing health, environmental, and other pressures of urban traffic: a decision analysis on trip aggregation. BMC Public Health 2005; 5: 123 [1].

[comptraf-1] Tuomisto and Tainio: An economic way of reducing health, environmental, and other pressures of urban traffic: a decision analysis on trip aggregation. BMC Public Health 2005; 5: 123 [1].

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