In the "Shut the door" speech by Ellison Durant Smith, what is the tone and how do you know?

no. but, i heard its a good book. you could look up the answers or summary on some website.

the unique function that the video specifically ascribes to sins near tunnels is "prohibiting certain cargo". tunnels have specific control signs such as minimum and maximum speed, the appropriate use of headlight and prohibited cargo. for your own safety it is important you understand the signs when approaching a tunnel.