If travelling by vehicle, carry snow chains that are in good condition, because, if it has been snowing, your vehicle will only allowed to go over the pass with chains on the tyres. Getting stuck in the pass is a risk if the weather is bad. Anyone travelling there should take warm clothing, food and drink.
The pass was the scene of major battles with the Soviet troops, particularly when they withdrew. Many died in the tunnel itself. There is still the possibility of mines and other unexploded ordnance. Walking or driving off of the road itself is therefore not recommended.