Tucson’s Sun Tran bus system is joining other transit agencies Thursday, encouraging motorists to take part in the seventh annual “National Dump the Pump Day” event, sponsored by the American Public Transportation Association.

“If you go to suntran.com on the home page, there is a ‘Dump the Pump’ icon," says Kandi Young, a Sun Tran spokeswoman. " ... you can calculate your commute just to see how much you could save by riding transit.”

The website also has all of the schedules needed to plan a trip and live GPS tracking of the buses.