The Influence of Visibility Conditions in Horizontal Road Curves on the Efficiency of Noise Protection Barriers

Open access


Ensuring sufficient visibility on planned roads by sight distance testing is an integral part of every project, but problems with visibility can emerge when noise barriers are erected on existing roads. Namely, in order to provide sufficient noise protection, high noise barriers are often placed at minimum distance from the carriageway edge, and additional visibility testing in most cases is not carried out.

Research described in this paper consists of stopping sight distance tests conducted by means of specialized road design software MX Road, and noise barrier optimization conducted by means of specialized noise prediction software LimA using static noise calculation method RLS 90. The aim of this research is to establish whether the required stopping sight distance on road sections where minimum design parameters are applied can be achieved if the noise barrier is placed at minimum distance from the carriageway edge, and to establish whether the optimized dimensions of planned noise protection barrier will change if the barrier is placed on larger distance from the noise source, which is, in this case, the existing road.


  • [1]. LJ. ŠIMUNOVIĆ: „Road visibility”, Faculty of Transport and Traffic Engineering, Zagreb, 2011.

  • [2]. „The Law on Road Traffic Safety”, Official Gazette 74/2011.

  • [3]. „Regulations about basic terms that public suburban roads and their elements must comply from traffic safety aspects”, Official Gazette 110/2001.

  • [4]. Environmental Protection Department & Highway Department: „Guidelines on design of Noise Barriers”, Government of the Hong Kong SAR, Second Issue, 2003.

  • [5]. „Regulations about highest noise levels in territory where people live and work”, Official Gazette 145/2004.

Romanian Journal of Transport Infrastructure

The Journal of Technical University of Civil Engineering Bucharest

Journal Information


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 8 8 8
PDF Downloads 1 1 1