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CNOSSOS-EU (Railway)

Note

The following information applies to both the European calculation methods (EU-2015, EU-2021) and the country-specific implementations (e.g. CNS-DE-2018, CNS-DE-2021, RVE-2019, RVE-2022), see also Calculation acc. to ... in chapter CNOSSOS-EU. If any differences in country-specific implementations exist, this is explicitly mentioned.

Emission Parameter

Train Classes and Penalties

With this option activated, the types of trains and train classes, numbers of trains and corrections, can be edited locally, or an existing list with number of trains can be selected. CadnaA will automatically calculate the emission level from the specified values.

Type of TrackRailhead RoughnessNoise Reduction at RailBridge

Selection of Track Type, Railhead Roughness, Noise Reduction and Bridge, whereby the preceding abbreviation (e.g. „EU“ or „DE“) refers either to the European calculation method (EU-2015, EU-2021) or to a country-specific implementation (see also chapter CNOSSOS-EU).

Type of Track

Type of track:

  • EU-MS, EU-MM, EU-MH, EU-BS, EU-MS, EU-BM, EU-BH uses datasets
    • from EU-2015 with calculations according to 2015/996 XX
    • from EU-2021 with calculations according to 2021/1226 XX
  • EU-D always uses the dataset from EU-2021 and therefore is not intended to be used for calculations according to 2015/996 XX
  • DE-BH, DE-S, DE-T1, DE-T2, DE-T3 uses datasets
    • from CNS-DE-2018 with calculations according to 2015/996 XX
    • from CNS-DE-2021 with calculations according to 2021/1226 XX
  • DE-NS always uses the dataset fromCNS-DE-2021 and therefore is not intended to be used for calculations according to 2015/996 XX
  • FR-traverse* uses datasets
    • from SNCF-2021 with calculations according to 2015/996 XX
    • from SNCF-2022 with calculations according to 2021/1226 XX
  • FR-direct* always uses the dataset from SNCF-2022 and therefore is not intended to be used for calculations according to 2015/996 XX
  • BE* always uses the dataset from INFRA-2022 and therefore is not intended to be used for calculations according to 2015/996 XX
  • HU* always uses the dataset from CNS-HU-2025

Railhead Roughness

Railhead roughness:

  • EU* uses datasets
    • from EU-2015 with calculations according to 2015/996 XX
    • from EU-2021 with calculations according to 2021/1226 XX
  • DE* uses datasets
    • from CNS-DE-2018 with calculations according to 2015/996 XX
    • from CNS-DE-2021 with calculations according to 2021/1226 XX
  • FR* uses datasets
    • from SNCF-2021 with calculations according to 2015/996 XX
    • from SNCF-2022 with calculations according to 2021/1226 XX
  • BE* always uses the dataset from INFRA-2022 and therefore is not intended to be used for calculations according to 2015/996 XX
  • HU* always uses the dataset from CNS-HU-2025

Noise Reduction at Rail

Noise Reduction at Rail:

  • DE* uses datasets
    • from CNS-DE-2018 with calculations according to 2015/996 XX
    • from CNS-DE-2021 with calculations according to 2021/1226 XX

Bridge

Bridge:

  • EU15* uses the datasets from EU-2015 and therefore is not to be used for calculations according to 2021/1226 XX
  • EU21* uses the datasets from EU-2021 and therefore is not to be used for calculations according to 2021/1226 XX
  • DE* uses datasets
    • from CNS-DE-2018 with calculations according to 2015/996 XX
    • from CNS-DE-2021 with calculations according to 2021/1226 XX
  • FR15* uses the datasets from SNCF-2021 and therefore is not to be used for calculations according to 2021/1226 XX
  • FR21* uses the datasets from SNCF-2022 and therefore is not to be used for calculations according to 2015/996 XX nicht vorgesehen.
  • BE* always uses the dataset from INFRA-2022

Radius of Curvature & Anti-Squeal Measure

With activation of this option the correction for curved tracks and - if activated - Anti-squeal measures are considered in the calculation. The implemented corrections follow the European calculation method or the country specific implementation, depending on the selection in the Configuration of Calculations.

According to EU-2015, squeal contribution shall be applied on railway track sections where the radius is within the ranges mentioned above for at least a 50 m length of track.

Rail Joints (1/100m)

Specify the number of rail joints per 100 m track length. Example: A joint density of n_l = 0,01/m results in an input of 1 in the field Rail Joints (1/100m) in CadnaA.

Slab Track (Gs=0)

With this option active, a ground factor of Gs=0 is used for the track area. With the option inactive, the ground factor used for the track area depends on the settings on „Ground Absorption“ tab (see Ground Absorption Tab).

Local Train List

see Common Input Data

In order to select specific locos, cars, or train compositions these need to be defined in the local or global library (see Train Class Libraries).

vmax (km/h)

When specifying a track-relevant maximum speed vmax the train speed will be adjusted if necessary. In the calculation the smaller of both values is used.

In EU-2015 states that various other railway-related noise sources like depots, loading/unloading areas, stations, bells, station loudspeakers, etc. can be present and that these sources shall be modeled, if relevant, by industrial noise sources.

Emission L'w

When selecting „Emission L‘w“ in the dialog of the rail, the emission can be entered directly. The emission parameter in CNOSSOS-EU is linear (unweighted) sound power level per unit length in third-octaves (for periods D/E/N).

Total-A

A-weighted sum level per period

Source Height

When specifying L‘w as emission parameter the source height will be at 0.5 m above railhead (see figure 2.3.a in EU-2015).