What are the two main categories of embankment slopes ?
- AFlat and Steep
- BRecoverable and Non-recoverableCorrect
- CDesirable and Undesirable
- DHazardous and Non-hazardous
Solution
Concept
Roadside slopes
Step-by-step solution
1. Roadside slopes are classed as recoverable (a driver can regain control, flatter than about 1V:4H) and non-recoverable (steeper, a vehicle cannot recover).
Explanation
The classification is based on whether an errant vehicle can safely recover on the slope.
Why the other options are wrong
Flat/steep, desirable/undesirable and hazardous/non-hazardous are not the standard classes.
Shortcut
Recoverable slope: 1:4 or flatter.
Correct answer: B) Recoverable and Non-recoverable