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!