It appears that Orange County (Ca.) toll roads are probably an example of normal goods.
Orange County has two toll road systems — the 51-mile system operated by Transportation Corridor Agencies and the 91 Express Lanes, operated by the Orange County Transportation Authority, which also runs the county's buses.
Travel on both systems declined a few years ago as the economic downturn altered construction and travel patterns. Because of the recession, toll road use projected for this decade did not materialize.
It's not immediately clear how the recession would change construction patterns. Maybe it should be obvious, but the coffee has not kicked in as I write this, so I'll blame the lack of caffeine.
In any case, it's tough to tell from this article whether it was the recession (and decrease in income) that came with it that caused the slow use of the toll roads or whether it was the change in construction patterns and the subsequent change in driver behavior that altered it.