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!