| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| At first, this measure of the space between the 2 rails varied quite a bit & trains had trouble switching tracks | the gauge | $1,600 | DJ | THE DAWN OF THE RAILROADS | 2018-05-03 | #7754 | |
| Term for the uniform distance between the rails; each country has a standard one | the gauge | $300 | J | TRAINS | 1991-02-04 | #1486 | |
| It's the term for the distance or width between the 2 rails of a railroad track | the gauge | $400 | DJ | THE RAILROAD | 1988-09-27 | #932 |