When visiting a major city

There are some rules to getting from one place to another when in a major city, not because the residents are rude or have unreasonable expectations, but because of the number of people and the faster pace. Waiting patiently behind someone who does not know to move to one side on an escalator when you need to walk down may mean missing the next subway train which may mean an extra 10 or 15 minutes and being late. That is why people get agressive, not because city people are more agressive by nature.
I swear I am not making this up, they are unspoken rules, and they are actually really good ones once you know them. If you follow them, you will not get one dirty look or pushy action from anyone to whom you are inadvertently being inconsiderate.
1. Sidewalks are the commuter highways of the city. So, if you are visiting, think of walking on the street as you would driving in your car. If you wish to walk slowly, stay to one side to allow people to pass. If you need to read something or look at something or stop for any reason, you remain aware of the pace of those around you and step to the side. If you are in a large group, dont walk at a slow pace in a big line blocking the whole sidewalk. That is like when three cars are traveling slowly taking up all three lanes on a three lane highway. Stopping in the middle of a crowded sidewalk if the equivalent of stopping your car in the middle of the street without warning. Standing in front of a doorway or a subway entrance is the equivalent to standing in the middle of an intersection. Even in you are walking fast, if those around you are going faster, you should be in the slow lane.
2. When you and a person going the other direction need to pass each other, each of you goes to your right. You let people out of things (stores, subway cars, elevators) before you go into them. When you are passing through a door you hand it to the person behind you if they are within a few steps. If someone holds a door out to you, you take it from them, you do not pass through it in front of them.
3. At intersections, people generally pay attention to the light turning yellow rather than the walk dont walk sign. Unlike outside of a city, cars generally stop at the yellow and dont speed up, mostly because they are going slower to begin with. Pedestrian traffic swtitches turns at the yellows. On the subway, you never stand even remotely in front of the door. You let every person that needs to get off do so before you attempt to get on.
4. Stand to one side if you want to stand on an escalator so that those who are in a hurray can walk up or down if they need to. If you stand next to the person you are traveling with and look behind you, you will see a stream of angry panicked looking people behind you. Dont do that to them, step to the side and let them be on time to their destination!
Ok-this has nothing to do with city traveling, but I would also like for cashiers everywhere to stop putting coins on top of bills when handing change to customers. It spills. Please first hand them the coins, then the bills. That way they can get their money in their wallet faster.