CLEVELAND, Ohio -- RTA wants businesses to help pay for free bus service, so an expected influx of visitors can move more easily among downtown's new and old destinations.

The Greater Cleveland Regional Transit Authority is working with downtown businesses to raise $720,000, for routes serving the soon-to-open Cleveland Horseshoe Casino and the Cleveland Rock and Roll Hall of Fame and Museum.

The money is needed to match the $2.88 million in federal cash that RTA has secured to operate the trolley-like buses on nights and weekends the next three years.

The new lines "will result in a significant asset to downtown residents, businesses, workers and visitors," RTA says in a pitch to the business community.

The lines would supplement two free routes already running weekdays downtown.

The new routes would both serve Tower City Center, a hub for RTA buses and rail lines; the casino; and the medical mart and convention center, scheduled to open next year.

The proposed C-Line Trolley would also stop in the Warehouse District. It would operate from 7 to 11 p.m. weekdays and from 11 a.m. to 11 p.m. on weekends.

The Rock Line Trolley would serve the Rock Hall, Great Lakes Science Center and Cleveland Browns Stadium from 10 a.m. to 5:30 p.m. on weekends.

RTA would launch a third free line too, called the Nine-Twelve Trolley.

It would move workers and visitors from 6 to 9 a.m. and 3 to 6 p.m. weekdays along East Ninth Street to parking at the Municipal Lot and at the Gateway East Parking Complex.

RTA is working with Cleveland's business leaders and downtown property owners to raise the money by April 1, so the service could start by June.

In another move to ease the movement of visitors and tourists, RTA's board voted Tuesday to offer easy-to-use passes and to negotiate discounted fares for large convention groups.

RTA will offer one-, two- and four-day fare cards called the "Cleveland Pass." A pass will cost $5 per day, the same as all-day fare for RTA's bus and rail routes.

Visitors will be able to buy the passes online at riderta.com or at traveler hotspots, such as Cleveland Hopkins International Airport.