Still, each foreign climber is required to have a Sherpa guide and bad weather left them with only a five day window when they could try to reach the top so that worsened the traffic jam.
It's to try to help live in a situation that everybody is in traffic jam in the cities and they're polluted city and they try to get through them, to live on that.
Even if you aren't trip chaining it's no fun being stuck in a traffic jam – that's a large number of vehicles close together moving slowly – or being packed into a crowded train like sardines.