This is phase 1 of NYC challenge, of 10 planned phases. One circle represents one city, number in the circle represents city code that is used for naming bus, trolley, tram, train and ferry lines. Red color represents tram system in the city, green - trolleys, dark orange - buses. Blue lines represents onground train routes, while metro will be black, but in next 3 phases I wont have metro...
On the appropriate side of circle, there is a name of the city and all lines that goes in and trough that city, which are distinguished by color as mentioned above.
Tram : XX-1AA
Trolley : XX-10BB
Bus : XX-CC
Train : DD-XXYY
XX-Code of the city (YY is code of the another city through which the vehicle passes, usually used only for Passenger trains and ferries.)
AA-number of the line, only counting tram lines.
BB- same as above, only for trolleys
CC - ^^ only for buses
DD - ^^ only for trains
Rectangular with the letter in it represents airport. It's letter B cuz it is second airport I connected, but I forgot to draw first one.

I hope this map is okay, so I can go on, need more opinions
