How to create Lw_railway

[pierromond]

Discussed in https://github.com/Universite-Gustave-Eiffel/NoiseModelling/discussions/624

^{Originally posted by IsotoCedex October 31, 2023} I´m not able to generate Lw_railway from source data: SourceData.zip

When run the script "Railway_Emission_from_Traffic", no power emission is calculated. Every LW, for every frecuency, is "-99.99"

[pierromond]

related to #628