Estimating Public Transport Emissions from General Transit Feed Specification (GTFS) Data
Running exhaust emissions factors for buses from Brazil (CETESB)
Speed-dependent emission factor from the European Environment Agency (...
Scale local emission factors in order to make emission estimates a fun...
Running exhaust emissions factors for buses from United States (EMFAC2...
Running exhaust emissions factors for buses from United States (MOVES3...
Emissions from road vehicle tyre, brake, and surface wear from the Eur...
Spatial aggregation of emission estimates into a grid
Summarize emissions estimates
Convert emission estimates from list to data.table format
Emission model
Correction factor equation
Multiply emission factors by distances
Add slope class into the transport model (LineString Simple Feature ob...
Transport model
A bottom up model to estimate the emission levels of public transport systems based on General Transit Feed Specification (GTFS) data. The package requires two main inputs: i) Public transport data in the GTFS standard format; and ii) Some basic information on fleet characteristics such as fleet age, technology, fuel and Euro stage. As it stands, the package estimates several pollutants at high spatial and temporal resolutions. Pollution levels can be calculated for specific transport routes, trips, time of the day or for the transport system as a whole. The output with emission estimates can be extracted in different formats, supporting analysis on how emission levels vary across space, time and by fleet characteristics. A full description of the methods used in the 'gtfs2emis' model is presented in Vieira, J. P. B.; Pereira, R. H. M.; Andrade, P. R. (2022) <doi:10.31219/osf.io/8m2cy>.
Useful links