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!