User fees should pay for the bulk of the upkeep, but the riders aren't getting all of the benefit from ongoing operation and shouldn't pay all of the cost. For one example, if DC or SF had their mass transit go 24 hours, it would be nice for the riders, but it would be REALLY nice for the nightlife venues in those cities, who would bring in a lot more business, and thus taxes and jobs. They should pay their share, too.
I lived there a couple years, which was plenty to get frustrated.
http://www.infrastructurereportcard.org/south_carolina/south-carolina-overview/ Not sure where that site's getting its data, but it fits with what I remember from reading the daily newspaper there:
"
1,141 of the
9,271 bridges in South Carolina
(12.3%) are considered
structurally deficient.
840 of the
9,271 bridges in South Carolina
(9.1%) are considered
functionally obsolete.
Driving on roads in need of repair
costs South Carolina motorists $811 million a year in extra vehicle repairs and operating costs
$255 per motorist.
40% of South Carolinas roads are in poor or mediocre condition."
Not sure how those stack up against averages, but they're not great regardless. Another site:
http://www.sctransportation.com/facts.html