You pay so others don't have to
Toll roads are very durable - they never go away. There are toll roads in other cities, the bonds for which have been paid 4 times over, which provide some people with a terrific income. The tolls you pay are paid with after tax dollars, which is nice. And tolls are an act of generosity - you pay so that everyone else doesn't have to pay more in taxes. Its a win, win, win, win.
A North Raleigh resident