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,,,,£££,,£ 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!        ,,,,,£,,,,
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