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...~^$£###                  rails                   ###£$^~...
....~^$£##                                          ##£$^~....
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..~^$£#### ££££££££££££££££££££££££££££££££££££££££ ####£$^~..
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....~^$£## ££££££££££££££££££££££££££££££££££££££££ ##£$^~....
...~^$£###                                          ###£$^~...
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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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