Leak on a LH2 tanker

Hydrogen leaked from a liquid hydrogen tank-trailer parked at a rest area of a highway.
The release was remarked as a plume of with vapour, plausibly caused by cold hydrogen release and vapour condensation.
Police, fire authorities, and Korea Gas Safety Corporation checked the amount of hydrogen leakage and the risk of explosion at the scene and mobilised the safety equipment required to complete the safe remove hydrogen from the tank, which happened in 6 hours.
There were no injuries or negative consequence to health. Nevertheless, dealing with the emergency caused severe congestion in the area. The rest area and a 13 km section of the highway were closed for more than three hours causing traffic chaos.

The INITIATING CAUSE appears to be a leak at valve-pipe joint in the control cabinet at the rear of the tank.
The ROOT CAUSE is unknown

valve, pipe

There is not enough information to draw specific lesson n learnt, The only point deserving mentioning is that this incident confirm the general evidence that liquid hydrogen tank releases do not ignite often.