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!