PITTSBURGH — Three weeks after cutting service by 15 percent, Allegheny County's public transit system announced a second round of service cuts and layoffs effective in the fall if the state Legislature does not provide more funding.

The Port Authority of Allegheny County said Friday it will eliminate 34 weekday and 18 weekend bus and rail routes, and reduce service on 65 other routes, representing a 10 percent cut in service.

"Should this service reduction go into effect in September, it will reduce transit options in Allegheny County to unthinkable levels," Port Authority Chief Executive Steve Bland said.

"From here on out, we're starting to cut muscle and bone. We're not just cutting fat out of the system," Bland said.

Some areas will lose service, he said.

The plan also calls for more than 170 employees to be laid off.

Last month, the transit system eliminated 29 weekday routes and a Saturday-only route, 52 of 83 Saturday routes and 25 of 68 Sunday routes. It also trimmed its customer service hours and laid off more than 200.

The agency's board last month approved a $325 million budget that called for using money from a special fund to cover a projected $44.6 million deficit for the fiscal year that began July 1. The budget included plans to cut service in September unless state lawmakers bailed out the agency.