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!