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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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All PIARC Publications

There are 51 results for your search

  • Impact of New Propulsion Technologies on Road Tunnel Operations and Safety - A PIARC Technical Report

    Alternative propulsion technologies, including battery-electric vehicles, are becoming more prevalent. Whilst such vehicles remain a small overall proportion of the vehicle fleet, the combination of impacts of Government policy and technological advances in alternative fuels is expected to accelerate [...]

    • Date : 2023
    • Pages : 74
    • PIARC Ref. : 2023R34EN
    • ISBN : 978-2-84060-822-6
  • Improving Road Tunnel Resilience, Considering Safety and Availability - Technical Report

    This report presents a road map to improve the resilience of road tunnels, based on a literature review, a collection of case studies and the knowledge and experience of the members of Working Group 2 “Safety and Resilience” of PIARC Technical Committee 4.4 “Tunnels”. The content of the report [...]

    • Date : 2023
    • Pages : 309
    • PIARC Ref. : 2023R26EN
    • ISBN : 978-2-84060-801-1
  • Good Practices in Maintenance and Traffic Operation of Heavily Trafficked Urban Road Tunnels - Technical Report

    Maintenance and operation of heavily trafficked urban road tunnels is one of, if not the most outstanding challenge for authorities, owners, operators and designers of tunnels. This full report makes amends in detailing the challenges and inherent good practices for maintenance and operation from traffic [...]

    • Date : 2022
    • Pages : 59
    • PIARC Ref. : 2022R34EN
    • ISBN : 978-2-84060-734-2
  • Good Practices in Maintenance and Traffic Operation of Heavily Trafficked Urban Road Tunnels - Collection of Case Studies

    The aim of the case study collection report is to gather, evaluate and comment on international expertise related to maintenance and traffic management in highly trafficked urban road tunnels. A large number of cases were collected, which were particularly suitable for providing an insight into the [...]

    • Date : 2022
    • Pages : 32
    • PIARC Ref. : 2022R06EN
    • ISBN : 978-2-84060-681-9
  • Impact of New Propulsion Technologies on Road Tunnel Operations and Safety - Literature review

    Alternative propulsion technologies, including battery-electric vehicles, are becoming more prevalent. Whilst such vehicles remain a small overall proportion of the vehicle fleet, the combination of impacts of Government policy and technological advances in alternative fuels is expected to accelerate [...]

    • Date : 2022
    • PIARC Ref. : 2022R05EN
    • ISBN : 978-2-84060-680-2
  • Improving Road Tunnel Resilience, Considering Safety and Availability - Literature Review

    This report presents a review of literature on the improvement of road tunnel resilience as well as a collection of case studies that illustrate how this topic is being dealt with in practice. The content of the report is addressed at several target groups involved in the planning, design, implementation, [...]

    • Date : 2022
    • Pages : 191
    • PIARC Ref. : 2022R04EN
    • ISBN : 978-2-84060-679-6
  • Improving Road Tunnel Resilience, Considering Safety and Availability - Literature Review

    This report contains a review of literature on road tunnel resilience, including more general literature on resilience principles or aspects that could be applied to tunnels. Many definitions for “resilience” were found, but the Working Group decided on the following definition in the context of [...]

    • Date : 2021
    • Pages : 207
    • PIARC Ref. : 2021LR01EN
    • ISBN : 978-2-84060-631-4
  • Large Underground Interconnected Infrastructure - Technical Report

    This report is a continuation of the previous one published in 2016: “Road tunnels: complex underground road networks” (2016R19EN). Its objective is twofold: extend the panel of networks investigated, both geographically and in terms of their complexity and diversity, analyse in a much [...]

    • Date : 2019
    • Pages : 97
    • PIARC Ref. : 2019R42EN
    • ISBN : 978-2-84060-594-2
  • General Principles to Improve Accessibility for Persons with Reduced Mobility in Road Tunnels - Technical Report

    The report provides the general principles that apply when making allowances for persons with reduced mobility in road tunnels. The means of facilitating their ability to raise the alarm, and to evacuate in critical situations, are examined. Facilities and examples from the following countries are provided: [...]

    • Date : 2019
    • Pages : 55
    • PIARC Ref. : 2019R20EN
    • ISBN : 978-2-84060-543-0
  • Introduction to the RAMS Concept for Road Tunnel Operation - Technical Report

    Road tunnel operators are increasingly aiming to adopt a sustainable approach to road tunnel operation whenever possible. They are thus starting to look into ways of optimising the lifecycle performance of systems and equipment, whilst at the same time guaranteeing the required level of safety. One [...]

    • Date : 2019
    • Pages : 38
    • PIARC Ref. : 2019R05EN
    • ISBN : 978-2-84060-504-1
  • Prevention and Mitigation of Tunnel-Related Collisions - Technical Report

    Because a road tunnel is an enclosed space, many tunnel safety measures are rightfully aimed at controlling the risks of fires and dangerous goods. However, practice generally shows that most injuries and fatalities in tunnels are actually related to traffic incidents that could also happen on the open [...]

    • Date : 2019
    • Pages : 255
    • PIARC Ref. : 2019R03EN
    • ISBN : 978-2-84060-502-7
  • Road Tunnels: Vehicle Emissions and Air Demand for Ventilation - Technical report

    The design of a road tunnel ventilation system must consider fresh-air demand for maintaining in-tunnel air quality during normal and congested traffic operations and the control of smoke and hot gases in case of fire. The ventilation capacity to manage a fire incident frequently drives the ventilation [...]

    • Date : 2019
    • Pages : 61
    • PIARC Ref. : 2019R02EN
    • ISBN : 978-2-84060-500-3
  • Road tunnel operations: First steps towards a sustainable approach

    In terms of sustainable development, the current situation in the field of infrastructure varies greatly from one country to another. Certain countries have laid down regulations; a few have set objectives to be achieved, while others have no regulations at all. So far, the World Road Association has [...]

    • Date : 2017
    • Pages : 69
    • PIARC Ref. : 2017R02EN
    • ISBN : 978-2-84060-470-9
  • Design fire characteristics for road tunnels

    Fire safety in tunnels depends on an amalgam of systems and procedures designed to achieve the best outcome in the event of an incident. The "Design Fire", defined in terms of its magnitude, growth rate and duration, provides a basis for sizing the required systems and anticipating the operational measures [...]

    • Date : 2016
    • Pages : 66
    • PIARC Ref. : 2017R01EN
    • ISBN : 978-2-84060-471-6
  • Experience with Significant Incidents in Road Tunnels

    Approximately ten to fifteen years ago many countries introduced tunnel safety management systems and started paying attention to tunnel safety in a more structured way. PIARC report 2007R07 recommended an integrated approach to tunnel safety. As a result of this, many countries have gained experience [...]

    • Date : 2016
    • Pages : 67
    • PIARC Ref. : 2016R35EN
    • ISBN : 978-2-84060-444-0
  • Road tunnels: complex underground road networks

    Underground complex road networks are under development in the world due to the growing concentration of the population in large urban areas. The high occupation on the surface, the extension of the perimeter of the metropolises, the growing demand in travel and mobility, lead naturally and inevitably [...]

    • Date : 2016
    • Pages : 80
    • PIARC Ref. : 2016R19EN
    • ISBN : 978-2-84060-404-4
  • Lay bys and protection against lateral obstacles - Current practices in Europe

    Accidents which have occurred in tunnels have brought to light the danger that the perpendicular end-wall of lay-bys can present to road users in tunnels. Various European representatives of the PIARC Road Tunnel Operations Committee engaged in discussions on the topic of lay-bys and lateral obstacles [...]

    • Date : 2016
    • Pages : 38
    • PIARC Ref. : 2016R16EN
    • ISBN : 978-2-84060-400-6
  • Fixed fire fighting systems in road tunnels: Current practices and recommendations

    Fixed Fire Fighting Systems (FFFS) have been routinely used in road tunnels in countries such as Japan and Australia for decades, and there is increased interest in the use of FFFS in parts of Europe, North America and Asia. Large fire events in road tunnels continue to show the consequences of such [...]

    • Date : 2016
    • Pages : 80
    • PIARC Ref. : 2016R03EN
    • ISBN : 978-2-84060-375-7
  • Improving safety in road tunnels through real-time communication with users

    This report is a continuation of the one published by PIARC in 2008 on "Human Factors and road tunnel safety regarding users". It addresses two specific points raised in the conclusion of the 2008 report: "It is most important that motorists understand how to behave in tunnels, in critical situation" [...]

    • Date : 2016
    • Pages : 60
    • PIARC Ref. : 2016R06EN
    • ISBN : 978-2-84060-384-9
  • Best practice for life cycle analysis for tunnel equipment

    Life Cycle or Life Cycle Cost (LCC) aspects are becoming more important. From an economic point of view, it is important to consider these aspects both in the design and in the operation of tunnel equipment. This best practice report is a natural follow-up to the former report on life cycle aspects [...]

    • Date : 2016
    • Pages : 21
    • PIARC Ref. : 2016R01EN
    • ISBN : 978-2-84060-370-2
  • Risk evaluation, current practice for risk evaluation for road tunnels

    This report is intended to provide discussion on the various established strategies for the evaluation of the results of a risk analysis for the risk assessment of road tunnels. After a presentation of background information on risk evaluation, the principles of the different approaches, both qualitative [...]

    • Date : 2013
    • Pages : 91
    • PIARC Ref. : 2012R23EN
    • ISBN : 978-2-84060-290-3
  • Best practice for road tunnel emergency exercises

    Emergency exercises are an integral part of the planning process of road tunnel safety. Drawing on international experience in this area, this report is in the form of a detailed guide for defining objectives, prepare, implement and evaluate an exercise in the most efficient and productive as possible. [...]

    • Date : 2012
    • Pages : 50
    • PIARC Ref. : 2012R25EN
    • ISBN : 978-2-84060-292-X
  • Assessing and improving safety in existing road tunnels

    This report provides guidelines for a step-by-step process for the development of a safety upgrade programme for existing road tunnels, ensuring that the required safety levels are achieved. The report represents the work of PIARC Technical Committee C.4, Working group 2. A five step methodology is [...]

    • Date : 2012
    • Pages : 63
    • PIARC Ref. : 2012R20EN
    • ISBN : 978-2-84060-284-9
  • Recommendations on management of maintenance and technical inspection of road tunnels

    This report aims at presenting best practice for technical inspections as well as for the maintenance of equipment in road tunnels ranging from electromechanical systems to communication systems and operational devices. The scope, goal and types of maintenance are defined in Chapter 1. Chapter 2 [...]

    • Date : 2012
    • Pages : 45
    • PIARC Ref. : 2012R12EN
    • ISBN : 978-2-84060-279-2
  • Life cycle aspects of electrical road tunnel equipment

    Electrical equipment costs have risen dramatically in the past years: more and more complex systems are being used in tunnels. Knowing life cycles of equipment helps to reduce maintenance costs and to improve safety. This report presents the results of an international survey (twenty-seven answers [...]

    • Date : 2012
    • Pages : 37
    • PIARC Ref. : 2012R14EN
    • ISBN : 978-2-84060-272-5