Off hand I am thinking...
Since Dest code 9 is taken then you cannot add 91 (911, 991 etc), 92, 93 etc
But what about 9A?
I think A (Any) is the trick here.
9 - Rte 001 - Absorb 1 (9 is absorbed) Delete this current one
Use these instead
9A - Rte 001 - Absorb 1 (9 is absorbed)
911 - Rte 002 - Absorb ALL (all digits are absorbed) - External# 911
9911 - Rte 002 - Absorb ALL (all digits are absorbed) - External# 911
Testing
Instead of testing with 911 (not allowed unless given a warning through proper channels), use 311 (city issues) or 611 (repair) as the external # since they give an auto attendant.
Also, test with 8 so not to disturb others from dialing out with 9.
ie
8A - Rte 002 - Absorb 1 (8 is absorbed)
811 - Rte 002 - Absorb ALL (all digits are absorbed) - External# 611
8811 - Rte 002 - Absorb ALL (all digits are absorbed) - External# 611
I hope this seem right?