My mother was talking about that this weekend. (she works for Schneider national) 58 cents is more than she makes per mile.
By contrast, on the Pennsylvania Turnpike, truckers only pay 17.7 cents/mile.
Had an ex-brother-in-law who was an independent trucker as he explained the economics of trucking I can't see many truckers using the toll road either. However having been stuck on I-35 this last Thanksgiving I understand that something has to happen or the congestion on the road will make it unusable in a few years.