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SILENCE
Quieter Surface Transport in Urban Areas

SILENCE develops an integrated system of methodologies and technologies for the efficient control of urban traffic noise. This takes into account the overall needs of city authorities with respect to noise creation from individual traffic (on road) and mass transport (on rail and road). A holistic treatment is made of all traffic noise facets: urban noise scenarios, individual noise sources, infrastructure, traffic management, noise perception and annoyance.

Tags: Multimodal

Background

For decades, European policy-makers have concentrated on regulating noise emission from sources such as road and rail vehicles, aeroplanes and other equipment by fixing maximum sound levels, which has resulted in significant noise reduction from individual sources. For example, noise from individual cars has been reduced by 85% since 1970 and noise from trucks by 90%. However, no consideration has been given to reducing noise emission in urban areas and for some sources, such as railways, there was no EU legislation setting noise creation limits. As a result of this, and in response to the regulatory gap, the Commission Directive 2002/49/EC, relating to the assessment and management of environmental noise, was adopted. Its main aim is to provide a common methodology to address noise problems across the EU and it is in this context that the activities of SILENCE are to be seen.

Objectives

The main objective of SILENCE is the development of integrated methodologies and technologies to improve control of surface transport noise in urban areas.

The aspects are:

  • control at source
  • noise propagation
  • noise creation
  • human perception

for road, rail, infrastructure and cities.

SILENCE will provide:

  • relevant and world-leading technologies to assure efficient control of surface transport noise
  • innovative strategies for action plans for urban transport noise abatement and practical tools for their implementation
  • a significant reduction of people’s exposure to noise, especially under real urban conditions.

The expected outcome of the project is a reduction of noise emission in urban areas of up to 10 dB(A).

Engine testing
Engine testing
Photo by AVL

Description of work

SILENCE is divided into different subprojects (SP) and work areas, each concentrating on a specific noise-related issue. All the SPs form an integrated system with the participation of the various stakeholders: city authorities; public urban transport operators; national operators of railway traffic and road/rail infrastructure; public research institutes and universities; research and engineering companies; European associations; vehicle manufacturers and integrators; suppliers of equipment, systems and technology for vehicles/infrastructure; specialist SMEs.

The SILENCE subprojects are:

  1. Noise perception, annoyance
  2. Global modelling
  3. Vehicle/tyre/road interaction
  4. Road vehicle noise
  5. Rail vehicle noise
  6. Road surface
  7. Railway infrastructure and operation
  8. Road traffic flow
  9. City planning
  10. Dissemination and training
  11. Consortium management
The SILENCE project is working in close co-operation with other complementary research initiatives and takes into account the outcome of previous research projects.

Results

The positive results of SILENCE will benefit the overall population of the EU and will contribute to an improved quality of life of European citizens. Advanced noise reduction technologies and methodologies, and the improvement of development processes by decreasing development time and cost, ensure the leadership of European stakeholders and the competitiveness of the industry. The dissemination and training activities will be aimed to stimulate young engineers interest in noise research activities.

Selected deliverables:

  • Identification of annoying acoustic components of vehicles in order to develop guidelines for individual source-oriented noise reductions
  • A global modelling tool for road and rail applications to predict noise radiation into the environment
  • Design and hardware solutions for noise reduction with respect to vehicle/tyre/road interaction, under typical (sub-)urban conditions
  • Experimental and calculation tools and advanced noise reduction technologies for road vehicles
  • Highly efficient systems and technologies for trams, metros, freight and suburban trains for noise reduction and control
  • Advanced integral design and maintenance of lower noise road surfaces
  • Noise reduction solutions for rail infrastructure and operation
  • A toolkit for cities with practical urban traffic management techniques for noise reduction
  • Guidance for implementing noise action plans in cities.

For further information visit the website and participate in SILENCE dissemination events or international conferences with SILENCE presentations.

ICE train
ICE train
Photo by Deutsche Bahn

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