Pittsburgh Regional Transit says two closures will lead to delays this weekend. The first involves the T stops between First Avenue and Steel Plaza Friday through Sunday morning.
PRT crews are replacing a switch and a signal.
Shuttle buses will continue to operate between First Avenue at First Avenue Station and Ross Street at Steel Plaza Station during the first closure.
The second closure involves the Mt. Washington Tunnel Sunday night through Monday morning for electrical work.
T service will detour through Allentown.
