From time to time at Metro Exodus you will go through missions titled Winter, Spring, etc. - these are short transition stages, where you can mainly talk to other travel companions, search the train, or try additional interactions. The following section of this guide discusses the first stage of this type - the Winter.
In the beginning, you will have quite a discussion about the current situation with the rest of the crew. Among other things, you will learn about the "war" between Russia and the rest of the world. After all, you can approach the map and choose another destination, or spend some time searching for the train.
In the next cars, you can stop to listen to additional dialogues, light a cigarette or look for additional notes. Moments such as these, reinforce immersion quite well and lengthen the gameplay. When you are ready to go back to the map and set off to Volga.