&,,&,&,,,,                                          &,&&,,&,,&
,&,&&&&,,,                                          ,&&,&,&&,&
&&&&,,,&,,                                          ,&,&&&&,&&
,,,,&,,&&,                                          ,&&&,,,&&,
,,,,&&,&,&                                          &&,,&,,&,&
&,,,&,&&&&                  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!         &,&,&,,&,&
&&&,,&&&&&                                          ,&&&&&,&&&
,,,&,&,,,,                                          ,&,,,,&&,,
,,,&&&&,,,                                          &&&,,,&,&,
,,,&,,,&,,                                          &,,&,,&&&&
&,,&&,,&&,                                          &&,&&,&,,,
&&,&,&,&,&                                          &,&&,&&&,,