I have been thinking about this post and autopistas. Numbers are missing and therefore facts are missing. I tried to put some numbers together in my mind.
When ever I pull up to a tollbooth it seems there are one or two cars in front of me, heading down the road. When leaving and checking my rear view mirror, it seems the same, one or two cars approaching the toll booth.
To make the numbers easy, I guess at one car per minute. Say for easy thinking the toll is 100 pesos. that is 6000 pesos per hour. Now say this flow lasts 10 hours a day, afterwhich who knows. That makes it 60,000 pesos a day.
this comes out to 21,900,000 pesos a year. And after a 30 year contract that amount is 657,000,000 pesos. Odds are, in my mind, they make double or triple that over thirty years. If so, there is no reason to ever lower the rate.
Now think about I 294 in Chicago. at 50 cents a car and 50 cars a minute.