The Tucson Modern Streetcar is scheduled to begin running at 7 a.m. most weekdays, but on its first day of operation, the start time is 10 a.m.

The delayed start accommodates several ribbon-cutting ceremonies at stops along the four-mile streetcar route as city officials, local businesses, federal officials and the public mark the first day of a long-planned new form of transit in Tucson.

Those events mean some street closures.

Fifth Avenue between Toole Avenue and Broadway Boulevard will close from 6:30 p.m. Thursday to about noon Friday. The right lane of Congress Street between Fourth Avenue and Fifth Avenue will close at 6:30 p.m. Thursday. All of Congress will close from 5 a.m. Friday to about noon on Friday.

The streetcar project was approved by voters as part of the $2 billion Regional Transportation Authority plan in 2006. RTA funds from a half-cent sales tax, federal funds, and city funding make up the $198.8 million construction cost. The city projects the streetcar will cost about $4 million to operate each year.

Weekdays, during the day, the streetcar runs every 10 minutes. Service on evenings and weekends is every 20 or 30 minutes.

The streetcar line will be free to ride Friday, Saturday and Sunday. After that, it’s $1.50 for a one-way ride, or $4 for an unlimited day pass. The ticket stations at each streetcar stop sell only the day passes. Other passes may be purchased online or at SunTran transit centers.