1 Scope
2 Normative references
3 Definitions
4 Environmental conditions
4.1 General
4.2 Altitude
4.3 Air temperature and humidity
4.4 Air movement
4.5 Rain
4.6 Hail
4.7 Snow and ice
4.8 Solar radiation
4.9 Vibration and shocks
4.10 Pollution
4.11 Lightning
4.12 Electromagnetic compatibility
4.13 Fire protection
4.14 Environmental conditions in tunnels
Annex A (informative) Conditions relating to tunnels
Bibliography