As my visit involved an overnight stay I got this night photo of Pittsburgh Penn Station shrouded in the haze of wildfire spoke that had blown down from Canada. This haze would continue to impact my photos on the following morning's trip.
Heading out to South Hills Jct I pass Siemens SD-400 #4247 at the First Ave station. First Ave was built as an infill station to serve the south side of downtown which had seen increased development since the downtown light rail tunnel was opened in the mid 1980's. Part of this development was on the former site of the B&O Railroad station. First Ave also marks the boundary of the fare free downtown transit zone.
CAF LRV #4313 pulls out of South Hills Jct on a 42S Beechview Line run to South Hills Village. It is at this point where trains bound for the Overbrook line take the right hand diverging route onto the flyover.
PAT operates two batches of equipment, 55 SD-400 LRV's that entered service in 1985 and another 38 CAF SD-400 copies that came on board in 2003 for the restoration of the Overbrook Line. Apart from the numbers, the easiest way to tell the two classes apart is the design and placement of the center mounted headlamp. Below we see CAF LRV #4309 and SD-400 LRV's #4204 and #4230 departing South Hills Junction station towards Pittsburgh.
A week before my visit, Pittsburgh had hosted the American Public Transport Association (APTA) conference and had wrapped SD-400 #4202 for the occasion.
The Junction in "South Hills Junction" comes in the form of a double scissors crossover that connects on one side the Overbrook and Beechview Lines with the Allentown Line and Mt. Washington Tunnel on the other.
When built the service patterns made full use of the junction, but today it is essentially straight railed between the Mt Washington tunnel and the high level Beechview Line platforms as seen here with CAF LRV #4326.
Although a tower-like building is present, it is not clear if it is, or ever was, staffed for the purpose of routing trains through the junction. This is because the light rail system is equipped with automatic route setting transponders as seen under #4207. After LRV's berth at the platform, the route is lined and a Restricting signal displayed on the attendant dwarf signal.
The seemingly abandoned low level platforms at South Hills Jct are a remnant of the original Route 47 Overbrook line that bypassed the extensive street running on the 42 Beechview Line with a dedicated right of way that ran direct to Overbrook Junction. Modernization of the Overbrook line was deferred due to the cost of replacing large segments of single track and several rickety wooden trestles that could only support the weight of PCC cars. Routes 47 service was abruptly suspended in 1993 when the condition of the trestles became a safety hazard with rebuilt efforts beginning in 1999 and finishing in 2004. The "modern" LRV quality line would split/join with the Beechview via a brand new flying junction south of rebuilt high level platforms. The low level platforms would continue to see use as the terminal of the 52 Allentown, until that service was indefinitely suspended in 2011 due to recession era austerity cuts.