I find myself staying late at work (mostly doing self study or hacker news reading if I'm lazy) because Mopac commute times become totally reasonable somewhere

I find myself staying late at work (mostly doing self study or hacker news reading if I'm lazy) because Mopac commute times become totally reasonable somewhere between 6:00 & 7:00 pm. Like for every 90-120 seconds I stay in the office my commute time drops by like 60 seconds.