{"version":"1.0","type":"link","title":"Pulse code cab signaling - Newikis","description":"Pulse code cab signaling is a form of cab signaling technology developed in the United States by the Union Switch and Signal corporation for the Pennsylvania Railroad (PRR) in the 1920s. The 4-aspect system widely adopted by the PRR and its successor railroads has become the dominant railroad cab…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/9/93/SEPTA_Cab-Signal-display.jpg","thumbnail_width":842,"thumbnail_height":1016}