- 13: 8, // left on-ramp
- 14: 2, // right off-ramp
- 15: 8, // left off-ramp
- 16: 2, // right fork
- 17: 8, // left fork
- 18: 1 // straight fork
+ 13: 6, // left on-ramp
+ 14: 24, // right off-ramp
+ 15: 25, // left off-ramp
+ 16: 18, // right fork
+ 17: 19, // left fork
+ 18: 0 // straight fork