Within the city limits, public transportation, which is geared primarily to commuters, is available through Sun Tran, Tucson's bus system. The new electric streetcar, Sun Link, is a fun and convenient way to travel between Downtown, 4th Avenue and the University area. Buy a ticket at any of the streetcar stops ($1.50 one way or $4 for 24 hours) and hop on.
Sun Link Streetcar. 520/792–9222; www.sunlinkstreetcar.com.
Sun Tran. 520/792–9222; www.suntran.com.