ef_brazil_cetesb

Returns a vector or <code>data.table</code> of emission factors for buses based on
estimates from the Environment Company of Sao Paulo, Brazil (CETESB) 2019.
Emission factor estimates are expressed in units 'g/km'.

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>.

Joao Bazzo

gtfs2emis

Estimating Public Transport Emissions from General Transit Feed
Specification (GTFS) Data

Rafael H. M. Pereira

Pedro R. Andrade

Sergio Ibarra-Espinosa

Ipea - Institute for Applied Economic Research 

ef_brazil_cetesb function

<dl><dt>pollutant</dt>
<dd>character. Pollutants "CH4", "CO2", "PM10", "N2O", "NOx",
"NO2", "NO", "RCHO", "ETOH" "KML" (Vehicle Kilometers Traveled), "FC" (Fuel Consumption),
"gD/KWH" (grams of Diesel per kWh), "gCO2/KWH" (grams of CO2 per per kWh),
"CO", "HC" (Total Hydrocarbon), "NMHC" (Non-Methane Hydrocarbon),
"FS"(Fuel Sales) and "NH3".</dd>
<dt>veh_type</dt>
<dd>character. Vehicle categories by fuel: "BUS_URBAN_D",
"BUS_MICRO_D", "BUS_COACH_D" and "BUS_ARTIC_D".</dd>
<dt>model_year</dt>
<dd>numeric. Vehicle model year. Supports <code>model_year</code> from
1960 to 2020.</dd>
<dt>as_list</dt>
<dd>logical. If <code>TRUE</code> (default), the function returns the output
in a <code>list</code> format. If <code>FALSE</code>, the output is returned in a <code>data.table</code>
format.</dd></dl>

Arguments

Running exhaust emissions factors for buses from Brazil (CETESB) — ef_brazil_cetesb

<dl>

<dt>pollutant</dt>
<dd>character. Pollutants "CH4", "CO2", "PM10", "N2O", "NOx",
"NO2", "NO", "RCHO", "ETOH" "KML" (Vehicle Kilometers Traveled), "FC" (Fuel Consumption),
"gD/KWH" (grams of Diesel per kWh), "gCO2/KWH" (grams of CO2 per per kWh),
"CO", "HC" (Total Hydrocarbon), "NMHC" (Non-Methane Hydrocarbon),
"FS"(Fuel Sales) and "NH3".</dd>


<dt>veh_type</dt>
<dd>character. Vehicle categories by fuel: "BUS_URBAN_D",
"BUS_MICRO_D", "BUS_COACH_D" and "BUS_ARTIC_D".</dd>


<dt>model_year</dt>
<dd>numeric. Vehicle model year. Supports <code>model_year</code> from
1960 to 2020.</dd>


<dt>as_list</dt>
<dd>logical. If <code>TRUE</code> (default), the function returns the output
in a <code>list</code> format. If <code>FALSE</code>, the output is returned in a <code>data.table</code>
format.</dd>

</dl>

ef_brazil_cetesb: Running exhaust emissions factors for buses from Brazil (CETESB)

Description

Usage

Value

Arguments

Details

See Also

Examples

vehicle	description
BUS_URBAN_D	Urban Bus Diesel (5perc bio-diesel)
BUS_MICRO_D	Micro Urban Bus Diesel (5perc bio-diesel)
BUS_COACH_D	Coach (inter-state) Bus Diesel (5perc bio-diesel)
BUS_ARTIC_D	Articulated Urban Bus Diesel (5perc bio-diesel)