Ventra is the Chicago transit system that allows passengers to simply tap their Ventra card and go. Users purchase a reusable Ventra card—or a one-day or single-ride ticket— from the vending machines at all CTA rail station, select retailers like CVS and Walgreens, and some currency exchanges. Cash is accepted, though change is not given. As passengers board a bus or train, they tap it against the small screen, wait for the green “Go” sign and they’re done. www. ventrachicago.com.