## 4 Results
### Comparative Analysis of CBA Methodologies and Results
#### 4.1.3 Comparison and Assessment of the Applied Unit Costs of Greenhouse Gases in CBA Methodologies  
In terms of the unit cost of GHGs, the most up-to-date methodology in the Czech Republic considers carbon pricing from 2022 onwards, according to the EIB recommendations. Chapter 4 presents recommendations for updating the GHG unit cost values in the Czech Republic's CBA methodology. Table 12 compares selected parameters and characteristics of the unit costs of GHG emissions from road transport in the CBA methodologies. Case Study: Comparison of Differences in GHG Emissions and GHG Cost Calculations by Implementing the Principles of CBA Methodologies in Different Countries for a Model of Semi-Trailer Transport on Road Infrastructure  
The calculation and comparative analysis do not track the change in the number of km and the change in the amount of GHG caused by the use of \"newly built infrastructure\" \begin{table}
\begin{tabular}{c c c c c} \hline  & **SK** & **H** & **A** & **CZ** \\ \hline \multirow{4}{*}{**Unit expression of the emission factor**} & \multirow{4}{*}{g/kg of fuel} & \multirow{4}{*}{Not specified} & 3.15 t CO\({}_{2}\)/t fuel & \multirow{4}{*}{g/1000 vehicle-km} \\  & & & & (type of fuel & \\  & & & not specified) & \\ \cline{3-5}  & Passenger & & & \\  & vehicles (petrol) & Bus & & \\  & Passenger & Light commercial & & Passenger car, \\  & vehicles (diesel) & vehicle & & average \\  & Light-goods & Trucks (3.5 t to 7.5 t) & & Passenger car, city \\
**Vehicle categorization** & vehicles (diesel) & Trucks (7.5 t to 16 t) & & \\  & Medium-goods & Trucks (16 t to 32 t) & & not specified & \\  & vehicles (diesel) & Trucks (more than 32 t) & & Light-goods vehicle \\  & Heavy-goods & Moped & & Heavy-goods vehicle \\  & vehicles (diesel) & Motorcycle & & \\  & Buses (diesel) & & & \\  & Diesel & Diesel & & \\
**Fuels proposed** & Petrol & Petrol & & \\  & Electricity & CNG & & Not specified & Not specified \\
**Source data** & [57; 58; 66] & [61; 67] & [62] & [63] \\ \hline \end{tabular}
\end{table} 
Table 11: Comparison of selected parameters and characteristics of GHG emission factors from road transport in CBA methodologies. \begin{table}
\begin{tabular}{c c c c c} \hline  & **SK** & **H** & **A** & **CZ** \\ \hline \multirow{2}{*}{**Unit cost expression**} & \multirow{2}{*}{EUR 86/ton eCO\({}_{2}\)} & EUR 18.47/ton eCO\({}_{2}\) & EUR 50/t CO\({}_{2}\) & EUR 90/ton eCO\({}_{2}\) \\  & & (HUF 7560/ton eCO\({}_{2}\)) & until 2022 & \\  & & & & From 2022 onwards, \\  & Unit price t CO\({}_{2}\)es in & European Investment & & for each year \\  & EUR at the 2021 & Bank (2013) data, of & (2009 price level) & individually, according \\  & price level & which the median & & to Table 8.58 in the \\  & & is recommended. & & CBA (3594 CZK/ton \\  & & [61] with reference to & & in 2023) \\  & [60; 66] & European Investment & [62] & [63; 65; 68] \\  & & Bank (2013) & & \\ \hline \end{tabular}
\end{table} 
Table 12: Comparison of selected parameters and unit cost characteristics of GHG emissions from road transport in CBA methodologies. ture\", but the disparity in the calculation using the different CBA methodologies of the countries analyzed. 2.1 Calculation of GHG Emissions and Costs According to CBA Methodologies of Selected Countries and Comparison of Results  
Inputs and input information for the calculation:  
For the model calculation of GHG emissions for specific transport, a truck complying with the Euro 6 emission standard and a semi-trailer with the following technical data given as its gross weight, curb weight, technical axle load, technical coupling load, and permissible rear axle load are used. Tables 13 and 14 give the technical data of the truck and semi-trailer used. Tables 16-18 show the results of the emission calculations according to the HBEFA methodology and according to EN 16 258 for the considered transport route from \(\dot{\text{Z}}\)ilina to K\(\ddot{\text{o}}\)sice and the semi-trailer truck combination used.