This is my interpretation of the fifth layout shown in the #150 Series Layout Ideas Pamphlet.
Warning: This layout will short out if built from 9V track (or 12V track), it is shown for completeness only. Do not build it.
| 1 | Basic Oval |
| 1 | Crossover |
| 2 | x 4515 |
| 1 | x 4520 |
| 2 | x 4531 |