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!