Where can I find the rules to a given crayon rail game online? I have tried looking on a game page (i.e. EuroRails), but there is no link to the rules there. I did manage to find a link to the Empire Express rules, but I'd like links to the other rail games, if possible.
While I don't see a complete rulebook for EuroRails, the BoardgameGeek page does contain a number of reference sheets. I'd start with the BGG page for each game you're interested in and go from there.