Which letter in the timetable's 4.3 column signifies a junction with another railroad?

In the timetable's column 4.3, the letter that signifies a junction with another railroad is represented by "J." This designation is used universally in railroad timetables to clearly indicate where train routes intersect with those of another railroad, allowing for easier navigation and understanding of the rail network. Recognizing a junction is crucial for dispatchers, as it helps them coordinate train movements effectively, ensuring safe operations and minimizing delays. This allows for seamless transitions at critical points where different railroads may share infrastructure or facilitate transfers. Other letters in the column may represent different operational characteristics but do not specifically denote a junction with another railroad.