2. You cannot use any freight lines, but you can use any line that has a passenger service at least weekly (not every 3rd Monday etc).
8. IN THE EVENT OF A WRONG ANSWER:
If a submission to the quiz is incorrect, but there have been no further posts, the author may edit their post.
If there have been further posts, either of two circumstances should occur;
i) The author states their position, thus making any posts after the original superfluous. The game is then continued by a different individual, starting from the station before the incorrect submission.
ii) Another individual states their suspicion, which is then confirmed by the OP. Anyone is then welcome to continue the game, again starting from the station before the incorrect submission.
If an individual states that there is a mistake when there is not, their post is invalid, and another poster may continue as normal.