Fast underground belt
| Fast underground belt | 
- Base game
 - Space Age mod
 
The Fast underground belt is the second tier of Underground belts. These type of belts are generally used to allow a transport belt to cross another transport belt by going underneath it. It has a maximum underground distance of 6 tiles, 2 more than the basic underground belt.
The speed of the Fast underground belt is the same speed as the Fast transport belt, twice as fast as a basic Transport belt.
Other fast belts
| Fast transport belt | Fast splitter |- | 
Other underground belts
| Underground belt | Express underground belt |- | 
History
- 0.15.7: 
- Increased the underground belt length (basic, fast, express) from 5,5,5 to 5,7,9.
 
 
- 0.13.0: 
- Underground belts won't connect if underground belt ghost is in the way.
 
 
- 0.2.8: 
- Can now be rotated
 
 
- 0.2.0: 
- Introduced
 
 
