First of all let me explain that the word "train" is not only used for what we call in Egypt "atr" it’s also the name Australians call their "metro" system.
How the rail system was built
The way the system is built is pretty smart and has saved the government (an therefore the tax payers) a lot of money, as the same railroads an stations are used for interstate and inside-state trains, the specifications are the same and all the government needs to do is just build more tracks/stations if there is demand to expand
In Sydney the carriages are 2 storey's high to hold more commuters, while Melbourne trains are 1 storey high - like Egypt’s trains.
Personal experiences on Australin trains
Two of the most pleasant experiences I’ve ever had were on my first trip using Australian trains:
The first was that I bought a train ticket, carefully found out which platform is mine, counted how many stations till I reach my destination, and jumped on the first train that came and started counting, so I counted my stations and when I expected Wiley park I found out I’m in Merrylands! At the same moment two policemen came and asked me for my ticket (by the way officers wearing grey uniforms are train officers, others wearing light blue are ordinary (general) police)
I showed them mine and told them I’m lost, I guess my accent showed that I’m new to the country and instead of giving me a fine (I later found out that it's a $200) they helped me, drew a map where I should go and explained that I needed to change trains at one of the stations I passed (i was used only to Elmarg - Helwan where u don't need to change trains!) the officer wrote on the back of my ticket that it's ok for me to travel (incase I got stopped again by rail police) and offered to come with me if I wanted :)
The other situation is that after I finally reached my destination I couldn't find the magnetic ticket reader machines to get me out of the station! I found an exit that took me directly to the street and because I wasn't sure if I was breaking any laws, I held my ticket clearly visible in my hand almost above my head in case anybody stopped me! lol
I found out later that the policy behind this is that the rail company feels that the default is that most passengers are honest so there's no need to have machines in all stations, surprisingly many of my trips I’d buy a ticket and never use it in either entering or leaving! However as I mentioned before, rail police often patrol the trains and will fine you if you don't have a ticket.
Rail ettiquette
Rail police are usually nice, you can ask them for directions or for assistance, they're multi-ethnic and I’ve spotted a few Arabs among them, along with Indians, Asians and of course Australians, they usually patrol as couples.
Trains are fairly clean, and it's quite rare to find torn chairs etc (although they do exist), and usually you can find a seat unless you're traveling in the rush hour.
Passengers don't push each other on entering or alighting from the train, the reason behind this is because trains only close doors when conductors are sure that everyone is safe and signal the driver to move.
Life in Australia 
