Thanks @logodave. @Kurt Moose, you may have not recognized them because the backround had been removed on the lower signals. Widely used on the PRR as seen here at Wilmore PA, 04/05/1989. First used in the teens and improved in following years, these had no moving parts, so were a vast improvement over semaphores and the amber colored lights penetrated fog well. As the decades passed, red lights were added to signals at certain locations. Each light was individually aimed to strike an engineman's eyes. The lights replicated semaphore blade positions and also allowed additional aspects. The coming of PTC in the last decade brought the end of many legacy signal types, these included. "PLs" were to be found on the LV and the N&W too, as they were once under PRR control. Photo below was taken at Radford VA on the former N&W, 04/02/2013.
Wow, don't see too many railroads these days still putting the corporate name on bridges! Proud company right there!
A battered station sign on the Erie's Port Jervis, NY station, 11/1981. The town was first a Port on the Delaware & Hudson Canal, as built in the 1820s. The Erie arrived in 1848 and the city became a Division Point on the road with major facilities, including a roundhouse and yard. The station was built in 1892 and has since been renovated.
Ha! Has that look about it, doesn't it? Here's the Port Jervis station as found in August 1980. You can see the sign on the right eave.
Just went and got a sidewise look at the station in Port Jervis thanks to Street View. Very nicely restored and well maintained.