The selection of new reference test tyres for use with the CPX method, to be specified in ISO/TS 11819-3

Phil Morgan
Gijsjan van Blokland

The draft for ISO standard ISO 11819-2:2000 for CPX tyre/road noise measurements includes specifications for a set of four standard reference test tyres. These commercially available tyres were selected to cover the different mechanisms responsible for the generation of tyre/road noise. Three were chosen to be representative of passenger car tyres and one to be representative of heavy vehicle tyres. Since the draft standard was first written, these tyres have either been superseded or discontinued. It has therefore been necessary for ISO/TC 43/SC 1/WG 33 (Measuring Methods for Comparing Traffic Noise on Different Road Surfaces), the Working Group responsible for the Standard, to define recommendations for an updated set of reference tyres, at the same time considering whether fewer tyres could be used. This paper provides a summary of the recommendations for the new reference tyres and an overview of the review process which formed the basis of the recommendations, presenting specific results from the evaluation of candidate replacements for ISO tyre A.

LATEST NEWS


2017-11-30

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...


2017-11-30

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...


2017-11-30

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...


2017-10-26

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.


2017-10-16

ERPUG Forum

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.


2017-09-29

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...