Fare changes usually are slower to change than gas prices for customers at the gas station. Bus fare in NYC is $3, and they can't just change that day by day. (Unless our new mayor makes the buses free to ride!)

It might be more expensive as energy costs go up, but services aren't supposed to be run at a profit. The value in a mass transit system is very high.

But there is probably an impact. Now I'm curious about how they decide the fares