11.   Revenue rose in the latest quarter, but passenger traffic, measured in revenue passenger miles flown, fell slightly.

12.   Revenue passenger miles are the number of miles flown by paying passengers.

13.   The standard comparison is based on passenger miles traveled, calculated by multiplying the number of passengers by miles flown.

14.   They want to replace the excise tax with a user fee based on the number of passengers carried and passenger miles flown.

15.   In addition, Alitalia agreed not to use the subsidy to overly boost its capacity in terms of number of seats and passenger miles.

16.   That change results in a lower overall financial yield, since many small and newer carriers charge less per passenger mile than larger carriers, he explained.

17.   If you look at the trend, then rail travel per passenger mile is actually getting safer.