N2kR-TC Version 2.0, updated June 2026      SINTEF Digital

N2kR-TC is a software application that presents a collection of road traffic noise examples, calculated according to the Nord 2000 Road Method. After the  2006 release, the method has been revised several times, latest 2019.

The road traffic noise examples form a set of Type Cases, which represent pre-calculated situations. The situations include the type cases given in TemaNord 1996:525 ”Road Traffic Noise – Nordic Prediction Method”. In addition situations for building areas are included. As a main feature the noise level calculations can be made taking weather conditions into consideration, thus allow for the calculation of Lden – levels.

SINTEF Digital has developed this software on request from the Nordic Public Roads Administrations. In 2025-26 revisions were commissioned by VTI, Sweden, to include support for Swedish regulations.

Download and Installation

  • Download the N2kR v.2.0 setup package from here and unwrap it.
  • Run N2kR-TC_Setup.msi to install the program. If you get a Windows warning, you might have to right-click the file, select 'Properties', and unblock the program.
  • Download the typecases data (1.5 GB in 5 parts) here: Part 1, Part 2, Part 3, Part 4, Part 5.
  • Unzip the typecases data, and store all 'TyC_NN' subfolders in one folder.

Note that N2kR requires Microsoft .Net Framework 4.7.1.  If the N2kR Setup program detects that it is missing, it will automatically run the process of downloading and installing it. Alternatively the framework can be installed via Windows Update.

This document contains the changes in version 2.0 relative to previous versions.

Brief user guide

  • The user interface is composed by window frames for selecting base case, weather case, road data, traffic case, traffic numbers and noise unit. A graphical window frame shows a top view (map) of the case, and a cross section perpendicular to the road. A compass symbol indicates the geographical orientation of the top map. The cross section is used to display noise levels.
  • N2kR uses pre-calculated sound transmission data that amounts to 1.5 GB. These must be downloaded separatly and stored locally. In the menu named ”TC Source” the user can choose the local folder containing the data.
  • If you enter illegal numbers for any parameter, the background color of the edit box  changes. Yellow indicates thar the number is out of range. Red color means that the parameter cannot be interpeted as a number. Change the contents until the color returns to white.
  • A status line at the bottom of the window shows information on ongoing processes, or consecutive noise levels.
  • Click on the cross section to display the noise level in the closest calculated point.
  • DoubleClick on the cross section to highlight the surrounding 5 dB level interval.

Disclaimer

THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SINTEF OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.