In September, the Regional Transportation District was forced to cancel nearly as many bus runs as it did in all of 2015.
That's 811 runs that didn't happen because RTD is short-staffed by 11 percent.
RTD makes up the majority of the deficit through forced overtime, which costs more than $10 million so far in 2017.
This number already surpassed last year's $9.2 million in overtime, and there's still more than a month left this year.
It's also not always convenient for the drivers they're desperately trying to keep.
RELATED | RTD has a bus driver shortage
RTD said there are two reasons for more spending in 2017:
- Higher wages for drives
- More routes, which means there are more drivers on staff than ever before-- even with the shortage
Despite the shortage, RTD is on track to miss about 1 percent of its bus runs for the year.