Rail Roads

Here is the information pertaining to Rail Roads.
 * 1) A Rail Road must lead from one city to another, or from one city to a Natural Warp Temple.
 * 2) Rail Roads must not vary in height more then 21 blocks from the starting point at the city. (For example, if the road starting at the city is at Y 70, then it must not go below Y 60, or above Y 80.)
 * 3) Rail Roads must be relatively straight.
 * 4) Rail Roads must be a minimum of 3, and a maximum of 7 blocks wide.
 * 5) Rail Roads must be covered and protected from mobs, care must be taken that the top of the covering not exceed the height allowed from the start of a city. (In the example above, the roof of the road must not be above Y 80.)
 * 6) Rail Roads provide an income multiplier of 0.1 per block of length. Which equates to 10 Fens per block of length. A Rail Road of 500 blocks long, would provide 5,000 tax monthly.
 * 7) Rail Roads are protected by the server.
 * 8) Should a Rail Road, and a Road be made together, they will be protected together, and the tax modifier of both will be processed.
 * 9) Rail Roads CANNOT be diagonal. Never make any section of a Rail Road diagonal. Turns are ok.
 * 10) Rail Roads count towards the tax of the cities at both ends of the railroad. (Essentially doubling the tax value.)