Alson Bohn, past president of the South Branch of the AARP in Waynesboro, and Donald Haugh, vice president of the senior group's north branch, were on hand for Tuesday's ribbon-cutting ceremony.
"We've been trying to get this going for years," Bohn said. "Many senior citizens can't drive or shouldn't be driving and there are a lot of widows here who need the bus."
"There's a growing senior population here and many of them live in housing developments outside of town," Haugh said.
So far more than 500 area seniors have signed up to ride the bus.
The daily route runs from 8 a.m. to 6 p.m. Monday through Saturday beginning at the Center Square.
The fixed route makes stops at housing developments, both malls, Waynesboro Hospital, the YMCA, the senior center, government offices, human services offices, health services and other points.
Schedules are available in both local government offices, the Waynesboro Chamber of Commerce at 323 E. Main St., and most area government, health and social service agencies.
The bus can also be flagged down en route.
Bus service is being provided to Waynesboro and Washington Township by the Chambersburg Transit Authority. It is being financed largely through a Pennsylvania Department of Transportation grant, plus local government contributions and rider fees.
PennDOT will fund the service for a year as a trial program, said Doug Filson, director of CTA.
"We hope to get about 30 riders a day to make it pay," Filson said. He said between 50 and 75 riders a day make the Chambersburg system a success.
The Rouzerville Express, a private bus company, also expects to begin service between Rouzerville and the borough's west end this week. That bus will run in the evening, when the CTA bus is parked.