Below is my SATURDAY analysis.
N79 arrives Hicksville at :00 and leaves at :40
N24 arrives Hicksville at :30 and leaves at :53
N22 arrives Hicksville at :15, leaves at :30; arrives at :45. leaves at :00
N73 arrives HIcksville at :30 and leaves at :10
N20 arrives Hicksville at :47 and leaves at :01
The running times on N20, N22, and N24 average 75 minutes. Recovery time is usually 10% of running time which would be about 8 minutes for each. I SPECULATE that N22 turns on itself. Yes, the layover is 15 minutes with recovery of 8 minutes. However, it's easier to remember a departure time if it's clockface, which in this case is :30 and :00. N24 and N73 BOTH arrive at :30. Either N24 OR N73 turns to the next N79 which leaves at :40. However, even with 8 minutes recovery time on the N24, if anything goes wrong, it will leave late on the N79. I SPECULATE that the N24 turns on itself. I also SPECULATE that the N20 turns on itself. I SPECULATE that the arriving N73 goes out on the next N79 at :40. Running time is 35 minutes so recovery time would be 4 minutes, enough time for a 10 minute interline. I SPECULATE that the arriving N79 goes out on the next N73. N79 running time is about 40 minutes for recovery time of 4 minutes, enough time for a 10 minute interline.
Bottom line: N79 and N73 interline at Hicksville.
(I'm really sticking my neck out on this.) Back to proofing my state income tax return which isn't as exciting.