Tucson's streetcar carried 3,500 passengers on its first day of charging for rides, city officials said Tuesday.

The number is nearly what officials projected as the daily average passenger load.

The four-mile system operated smoothly on its first day, with the only problem being a few malfunctioning ticket vending machines at streetcar stations. Those were fixed quickly, officials said.

Tucson inaugurated the streetcar last week and allowed free rides for three days starting Friday. An estimated 60,000 jammed onto the eight double-car trains for trips through downtown and the University of Arizona.