- Speed limit
ensure that you drive within the speed limit
watch out for vehicles breaking down.
- Air Pollution
despite having vents and ventilation, during peak hours, the amount of particulates within the tunnel may increase. Turn on aircon in the recycled mode
- Possible Explosion
Failure of ventilation could increase combustible gases inside the tunnel leading to possible explosion
The tunnel raised the flood level. Watch out for possible flooding
- and many more...
It would be better to be aware than be complacent.