rails                   
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to follow  a set path. this path is 
 called a  "railway", which  is comprised 
 of two metal rails, hence its  nickname. 
                                          
 because the  low  friction  between  the 
 wheels of the train and the rail  metal, 
 there  are limits for how  acute a curve 
 can  be, and even  more  so for how much 
 the  ground  under  the  rails   can  be 
 sloped. thus a railway is often  not led 
 on top of hills, rather through  them in 
 tunnels   (if   they   are  large),   or 
            artificial chasms.            
                                          
 there will  be trees on the  side of the 
 rails, but not too  close,  or they will 
 be cut  down by  the  railway  janitors. 
 there  will  be  plains,  and bodies  of 
                  water.                  
                                          
 trains go  by  day  and by  night. along 
      the way, there is information       
 scattered,  often  put on top of  poles, 
 to be interpreted by the train  drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains  have to stop and wait 
 for something to happen, far  away. this 
 is signaled  by  red  or  green  lights. 
                                          
                                  
                                          
 many people  follow  the  rails by foot. 
 often  this  proves  to  be the  shorter 
 path  between two  points. however  this 
 is  frowned  upon,  and   very  impolite 
        toward the train drivers!