Sensors for the Gas Detection in Road Tunnels: Challenges for the New Mobility

Dear Colleagues,

The near future will see a new mode of mobility, one which will affect both light and heavy vehicles. After a transition period in which vehicles powered by traditional fuels will still persist, vehicles may be powered by hydrogen and/or be electric in nature. Risk and scenario analyses are being produced at a considerable pace, and the monitoring aspect of trace compounds is crucial to detect a possible gas leak with a large margin, both spatially and temporally. This is particularly true for hydrogen-powered vehicles where the TPRD (Temperature Pressure Relief Devices) system monitors for the possible explosion risk of high-pressure storage systems. This device will discharge hydrogen gas after a crash or a problem in the storage tank. Sensors for the detection of hydrogen in road tunnels, or more generally inside confined spaces, must have crucial characteristics (spatial and temporal resolution, etc.) to activate active and passive safety devices and prevent the ignition of a fire. The fire risk is quite high due to the nature of hydrogen (LEL% and minimum ignition energy). New knowledge on these issues and topics is welcomed in this Special Issue.

Dr. Davide Papurello
Guest Editor

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• road tunnel safety
• new energy cars (NEC)
• sensor requirements
• time resolution
• space resolution
• best available technology
• ventilation strategy