Talk:Gasbus - health impacts of Helsinki bus traffic
Suggestions of different groups for issue framing -- Mikko Pohjola 21:42, 18 February 2008 (EET)
Päivi Meriläinen, Matteo Prandi, Antonio Gasparrini, Pauliina Ahtoniemi
Scope
Purpose
To compare PM2.5 induced mortality in alternative public bus-transportation strategies as being considered by the Helsinki Metropolitan area.
Boundaries
- area: Helsinki Metropolitan area, Finland
- population: whole population in Helsinki area (1 million)
- primary PM2.5
- time period: Based on data 1996-1997, projected to year 2020
- Public Health effects: Mortality due to cardiopulmonary diseases, lung cancer and other non-accidental causes (?)
- Bus traffic tail-pipe emissions
- different ratio between the technologies
- fuel
Scenarios
- Business as usual (current bus fleet)
- All buses converted to modern diesel (EURO3-STD)
- All buses converted to diesel with particle traps
- All buses converted to natural gas buses
Intended users
- Helsinki Metropolitan area council
- Finnish government (e.g. Finnish ministry of social affairs and health)
- Scientific community
- Decision makers at local community level
Participants
- Scientists: KTL, YTV, Joint Research Centre @ European Commission
Definition
Variables
- Decision variable: Which bus engine?
- includes emissions from different engine types
- PM2.5 emission from bus traffic
- PM2.5 concentration of bus traffic in Helsinki area (= exposure and intake estimate)
- data: total conc. of PM2.5 exposure in Helsinki
- constant: Bus traffic intensity (if it remains the same)
- Dose-response
- slope uncertain à variable
- background mortality included as a constant
- human behavior (if data available)
- Health impact à mortality rate