Standardized corrections for temperature influence on tire/road noise

Air, tire and road temperatures substantially affect tire/road noise emission. For measuring purposes one would like to normalize measurements to a reference temperature of (say) 20 oC. This paper describes and examines the semi-generic temperature correction procedure which is presently considered for standardization in the ISO working group ISO/TC 43/SC 1/WG 27.

Based on a lot of research and extensive data compilations, the WG now thinks that it has sufficiently consistent data for proposing corrections to noise levels from measured air temperatures to a reference air temperature of 20 oC. Much of the recent work has been conducted in the ongoing European project ROSANNE. The drafts under production distinguish between two major cases: CPX (or OBSI) measurements and SPB measurements of pavement noise properties.

The paper describes what kind of data that have been used to make the decisions, their justifications, and presents the suggested temperature coefficients for various cases (i.e. for various reference tires, pavement types and the CPX/SPB methods).



Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...


New research programme for more efficient travel

The Swedish National Road and Transport Research Institute (VTI) is playing an important role in a major new research programme to find radical solutions leading to fewer trips and more efficient travel, along with tools to enable better use of roads and...


Simulator used to practice emergency responses safely

Emergency responses of the police, ambulance, and rescue services are associated with a high risk of accidents, but practicing them in real traffic is neither safe nor permissible. A simulator-based method developed by the Swedish National Road and Transport...


Simulation of cut-in by manually driven vehicles in platooning scenarios

A study in a VTI-driving simulator has showed that a platoon will be able to handle a cut in from a manually driven car. The results of this study have recently been presented at two conferences in Japan.



The five-year anniversary of European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017.


Self-driving buses in Sweden next year?

A self-driving, fossil-free bus. This idea might become reality through a forthcoming collaborative project involving the Swedish National Road and Transport Research Institute (VTI), Linköping University and several other participants. The project group aim...