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!