[grobdriver]

That does seem high.
We live outside Austin to the North.
The airport is way South of town.
We figured it up one time - a trip to the airport using Sh-130 is $7.00, $14.00 round trip (and when you need to catch a flight, it's worth it!).

So if we worked at the airport and used the toll road every week day for a month, we'd be paying $280 for tolls.

I guess other meandering on the weekend could drive the cost up another $10, $20, $30 bucks - but $600/month is out there.

[ruiner]

My guess is they calculated the same $280 that you did, rounded up to $300 and then doubled it for two working adults in the household.

Does it ever occur to folks that they sometimes have to balance where they want to live against the distance to their job?