Road Tunnels: Vehicle Emissions and Air Demand for Ventilation

In 1990 and 1995 PIARC published the calculation methodology and the emission factors for road tunnel ventilation design. An update of the existing PIARC methodology was necessary, as the emission standards of the vehicles were becoming more stringent and hence the vehicles cleaner. The old version described the emission situation up to the year 1995. This document has been produced by working group 2 of the PIARC Technical Committee on Road Tunnel Operations in the framework of its activities between [...]

CD-7802 - Pavement Recycling (Guidelines)

This document, realised by the PIARC Technical Committee on Road Pavements (C7/8), is avaible only on CD-ROM. It contains three different guidelines: cold in place recycling of pavements with cement, cold in place recycling of pavements with bitumen emulsion or foamed bitumen, and hot mix asphalt recycling in plant. After a general introduction the three techniques will be discussed. This document is not intended as a specification document or to be a state of the art report. Its [...]

Environment and Construction of Road Projects

One work area of the PIARC Committee on the Environment concerns the consequences of the construction of road projects. In July 1997, an inquiry was sent to all PIARC member countries. It dealt with the five major topics identified by the Working Group: soil and water protection; how to deal with contaminated land; recycling of used materials; how to take account of flora, fauna, archaeology, water and noise; work sites. This report contains the answers from twenty respondents and provides recommendations [...]

Road Tunnels: Emissions, Environment, Ventilation

Due to a steady tightening of emission laws for cars and changes in the risk assessment of a tunnel fire, some design data need constant updating. The Report of the PIARC Committee on Road Tunnels to the XXth World Road Congress, 1995 (20.05.B) reviews the art of tunnel ventilation over the last 15 years. In the present publication new design information and some references are given for dimensioning a longitudinal and a semi-transversal ventilation system.

Environmental Impact of Existing Pavements

The management of negative consequences such as the deterioration of the living environment, road hazard, energy consumption, air pollution, noise, biotope modification and road congestion are today's major challenges. We often talk about the long term but work on a short-term basis without any realistically-targeted, forward-looking vision. The aim over the longer term must be to address this problem fully, with no preconceived ideas, in order to establish strict standards and consistent [...]