Technical Reports Road tunnel operations

This page lists technical reports of PIARC in the field of Road tunnel operations. These publications are classified chronologically.

  • Large Underground Interconnected Infrastructure

    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 more thorough manner the particularities of this network nature, including: the geometry and impact of all the constraints related to the interchange points and connections, ventilation facilities: [...]

  • General Principles to Improve Accessibility for Persons with Reduced Mobility in Road Tunnels

    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: France, Slovak Republic, Denmark, Australia, the Netherlands, Germany, Austria, United Kingdom, Italy, Czech Republic, Sweden and Spain. The report is aimed at tunnel owners, designers and safety [...]

  • Introduction to the RAMS Concept for Road Tunnel Operation

    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 possible means of achieving this is based on monitoring the Reliability, Availability, Maintainability and Safety (RAMS) of systems/equipment, based on pre-defined requirements (these aspects are clearly [...]

  • Prevention and Mitigation of Tunnel-Related Collisions

    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 road. This means that measures to assure traffic safety are also very important. Usually, several causes contribute to a specific collision occurring in a tunnel, or in its direct vicinity. Not [...]

  • Road Tunnels: Vehicle Emissions and Air Demand for Ventilation

    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 sizing in highway and non-urban tunnels. Nevertheless, the fresh-air requirement for dilution during normal and congested operation, or special environmental constraints, can be dominant in tunnels [...]


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