Experience

You cross over the pedestrian bridge, hoping to catch the train before it leaves. You're two floors above the ground, and taking stairs would be faster. You need to get to the train, and to the last compartment if possible, because it would be closest to the staircase at your destination. You stumble down the stairs as fast as you can, walking as fast as possible, so that you can continue to breathe normally. Just as you exit the stairwell, you hear the crackling of the overhead power lines, heralding the arrival of a train, onto the station. 

You look up, and there it is, hurtling close, across the tracks that you must cross to get to the train you need to take. Without a second thought, you begin to run, as fast as you can, across the tracks, right before the train comes in, across to the last compartment of the train. A risky thing to do, crossing tracks right in front of a train.

But it's needed. Because the moment the incoming train comes to a halt, your train will leave, forcing you to wait fifteen minutes in the chilly night air for the next one. You know this, without consciously realizing it, without reading it somewhere, without being told by someone who's familiar with riding the railway system. You know this. 

That's experience.