WHAT IS THE HELSINKI REGION TRAVEL CO2 MATRIX?
Helsinki Region Travel CO2 Matrix 2015 is a dataset that contains CO2 emissions ( and some additional attributes) produced by public transportation (PT) and private car for routes between all 250 m x 250 m grid cell centroids (n = 13231) in the Capital Region of Helsinki. Calculations were done separately for two different times of the day using rush hour (08:00-09:00) and midday (12:00-13:00) schedules (for PT) and traffic conditions (for private car). The travel information in the CO2 matrix is based on the Helsinki Region Travel Time Matrix 2015 dataset. The grid cells are compatible with the statistical grid cells in the YKR (yhdyskuntarakenteen seurantajärjestelmä) data set produced by the Finnish Environment Institute (SYKE).
The CO2 emissions are calculated based on the distance traveled with different travel modes (private car & PT) on an individual route multiplied with specific carbon emission factors. Carbon emission factors are based on the same estimates that Helsinki Region Transport (HRT) uses in their Journey Planner service, more info here. Public transportation emissions are a sum of emissions based on bus, tram, metro, ferry and train. More information on the method in GitHub.
The dataset, produced by the Accessibility Research Group, University of Helsinki, is openly available for everyone for free (under a Creative Commons 4.0 Licence). We do not take any responsibility for any mistakes, errors or other deficiencies in the data.
DOWNLOAD THE DATA
The data have been divided into 13231 text files according to destinations of the routes. The files have been organized into subfolders that contain multiple (approx. 4-150) result files. Individual folders consist of all the text files that have same first four digits in their filename (e.g. 5785xxx). You can check the approximate locations of the YKR_ID-numbers, and the name of the associated data folder from this map. The data can be downloaded in a single zip-package from the following link.
Download the Helsinki Region Travel CO2 Matrix 2015:
In order to visualize the data on a map, the result tables can be joined with the YKR-grid shapefile. The data can be joined by using the field ‘from_id’ in the text files and the field ‘YKR_ID’ in MetropAccess-YKR-grid shapefile as a common key.
Download the grid shapefile from this link:
The data have been divided into 13231 text files according to destinations of the routes. One file includes the routes from all YKR grid cells to a particular destination grid cell. All files have been named according to the destination grid cell code and each file includes 13231 rows.
NODATA values have been stored as value -1.
Abbreviations in the field names:
pt = public transport
car = car
r = rush hour
m = midday
co2 = CO2 emissions (grams)
dd = driven distance
l = lines = Number of lines used on the route by public transportation
fc = fuel consumption = Estimated fuel consumption (liters) by car
|from_id||ID number of the origin grid cell|
|to_id||ID number of the destination grid cell|
|pt_r_co2||CO2 emissions (grams/passenger) of the route by public transportation in rush hour traffic|
|pt_r_dd||Distance (meters) of the route travelled by any public transportation vehicle in rush hour traffic|
|pt_r_l||Number of lines used on the route by public transportation in rush hour traffic|
|pt_m_co2||CO2 emissions (grams/passenger) of the route by public transportation in midday traffic|
|pt_m_dd||Distance (meters) of the route travelled by any public transportation vehicle in midday traffic|
|pt_r_l||Number of lines used on the route by public transportation in midday traffic|
|car_r_co2||CO2 emissions (grams/vehicle) of the route by private car in rush hour traffic|
|car_r_dd||Distance (meters) driven by car during in rush hour traffic|
|car_r_fc||Estimated fuel consumption (liters) by car during in rush hour traffic|
|car_r_co2||CO2 emissions (grams/vehicle) of the route by private car in midday traffic|
|car_r_dd||Distance (meters) driven by car in midday traffic|
|car_r_fc||Estimated fuel consumption (liters) by car in midday traffic|
Toivonen, T., M. Salonen, H. Tenkanen, P. Saarsalmi, T. Jaakkola & J. Järvi (2014). Joukkoliikenteellä, autolla ja kävellen: Avoin saavutettavuusaineisto pääkaupunkiseudulla. Terra 126: 3, 127-136.
DOI name for the dataset:
Toivonen, T., H. Tenkanen, V. Heikinheimo, T. Jaakkola, J. Järvi & M. Salonen (2016). Helsinki Region Travel CO2 Matrix 2015. DOI: 10.13140/RG.2.1.2601.0648
Scientific examples of the approach used here can be read from the following articles:
- Lahtinen, J., Salonen, M. & Toivonen, T. (2013). Facility allocation strategies and the sustainability of service delivery: Modelling library patronage patterns and their related CO2-emissions. Applied Geography 44, 43-52.
- Salonen, M. & Toivonen, T. (2013). Modelling travel time in urban networks: comparable measures for private car and public transport. Journal of Transport Geography 31, 143–153.
Helsinki Region Travel CO2 Matrix by Accessibility Research Group (University of Helsinki) is licensed under a Creative Commons Attribution 4.0 International License. More information about license: http://creativecommons.org/licenses/by/4.0/
If the dataset is being used extensively in scientific research, we welcome the opportunity for co-authorship of papers. Please contact project leader to discuss about the matter.