Matches in DBpedia 2014 for { ?s ?p <http://dbpedia.org/resource/Category:Railway_signaling_in_the_United_States> . }
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- Advanced_Civil_Speed_Enforcement_System subject Category:Railway_signaling_in_the_United_States.
- American_Railway_Engineering_and_Maintenance-of-Way_Association subject Category:Railway_signaling_in_the_United_States.
- Automation_of_the_New_York_City_Subway subject Category:Railway_signaling_in_the_United_States.
- Bell_Tower_(PRR) subject Category:Railway_signaling_in_the_United_States.
- Billups_Neon_Crossing_Signal subject Category:Railway_signaling_in_the_United_States.
- Erie_Railroad_Signal_Tower,_Waldwick_Yard subject Category:Railway_signaling_in_the_United_States.
- Essay_Tower subject Category:Railway_signaling_in_the_United_States.
- General_Code_of_Operating_Rules subject Category:Railway_signaling_in_the_United_States.
- Harris_Switch_Tower subject Category:Railway_signaling_in_the_United_States.
- Interoperable_Communications_Based_Signaling subject Category:Railway_signaling_in_the_United_States.
- Lamokin_Tower subject Category:Railway_signaling_in_the_United_States.
- Mars_Light subject Category:Railway_signaling_in_the_United_States.
- North_American_railroad_signals subject Category:Railway_signaling_in_the_United_States.
- Northeast_Operating_Rules_Advisory_Committee subject Category:Railway_signaling_in_the_United_States.
- Union_Tower subject Category:Railway_signaling_in_the_United_States.
- Wigwag_(railroad) subject Category:Railway_signaling_in_the_United_States.