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!