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!