Noise mapping is the best way to present information on the acoustic pollution. To design noise protection measures, authors use modern software package SoundPLAN, which is based on the up-to-date normative documentation and scientific researches. The program allows importing the results of calculations to Autodesk tools. Improving the efficiency of the noise protection design process is executed through the implementation of building information modeling (BIM). Data exchange between SoundPLAN, AutoCAD 3D or Revit and Navisworks is used in the development of building information model. In the article we present a new approach to noise reduction through implementation of noise data into the overall information model of the infrastructure or building project. BIM helps to track the collision of calculated noise levels with residential buildings, protected premises and workplaces. It lays a basis for the sound proof allocation of workplaces and development of protection measures. BIM also serves as a support tool for the design process of sound protection barriers, since it helps to avoid interconnection of noise barriers basement with engineering networks or paste a barrier in the proper place to provide its efficiency.

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Rail transport is one of the main sources of noise pollution in cities. It impacts up to 10% of residential territories in Russia. In this article, the factors affecting the noise emission of railway lines are analyzed and a calculation method is proposed to estimate the noise levels of railway traffic flows. The calculations carried out using the proposed method made it possible to estimate the noise levels of railway lines of various categories, ranging from 60 to 80 dBA, depending on the flow and the limit speed of the railway. Calculations show that dwellings at a distance of 70 to 950 m is under the influence of noise of railway lines exceeding limits. The proposed classification of railway lines by noise levels is laid as the basis for the development of noise maps, it also allowed to determine the most effective noise protection measures to ensure acceptable noise levels in the surrounding area. The most effective measures to reduce noise of trains seem to be a set of measures aimed at both reducing the noise at the source and on the propagation path, i.e. noise screens and their combination with measures to improve rolling stock and acoustic properties of the track.

The article discusses the method and results of in-situ investigations of the contributions of noise sources of railway transport to the external sound field. The main sources that form the external sound field are pantograph, inter-car coupler and wheel-rail interaction. Experimental studies were carried out for electric trains, passenger, high-speed and freight trains moving with different velocities. The tests have shown the wheel-rail pair makes the main contribution to the external field formation for all types of trains is made by. For high-speed trains and electric trains at speeds over 100 km/h, the noise of the pantograph begins to make a certain contribution. The sound level of electric and high-speed trains increases by 1.5 dBA and sound level of passenger and freight trains increases by 3-3.5 dBA with the increase of speed per each 10 km/h.