. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd Rolling Stock Vol. XVII. 174 Broadway, New York, March, 1904 No. 3 The Radebaugh Tunnel on thePennsylvania. Our frontis])iecc illustration showsthe block signal bridge at the entranceof the Radebaugh tunnel on the renn-sylvania Railroad. This tunnel is sit-uated about thirtj odd miles cast ofPittsburgh, and is just about wideenough to hold two tracks. As the tracks become involved or gauntlet-ed just before they enter, and all theway through the tunnel; and, thoughit is impossible for a pa
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd Rolling Stock Vol. XVII. 174 Broadway, New York, March, 1904 No. 3 The Radebaugh Tunnel on thePennsylvania. Our frontis])iecc illustration showsthe block signal bridge at the entranceof the Radebaugh tunnel on the renn-sylvania Railroad. This tunnel is sit-uated about thirtj odd miles cast ofPittsburgh, and is just about wideenough to hold two tracks. As the tracks become involved or gauntlet-ed just before they enter, and all theway through the tunnel; and, thoughit is impossible for a passenger trainto leave the passenger line, there be-ing no switch, yet it would completelyobstruct the freight line for the samedirection of movement wdiile within thetunnel. the two homes to danger andthe two distant to caution, as it pass-es under the signal bridge. With thesesignals in the stop position, neithera following passenger, nor a followingfreight train can advance beyond thebridge. .As soon as the passengertrain passes under the signal bridgebeyond the other end of the tunnel,. RADEBAUGH TUXXEL OX THE ^ RAILROAD. Pennsj-lvania is here a four track road,it is evident that the four lines mustiTarrow down to a little more than thewidth of two. in order to pass the right of the picture the twogoing tracks appear. They narrowdown near the entrance, and on the left,the two coming tracks are seen todiverge from the portal of the the going lines with theeye, it will be apparent that the two The actual fouling point for the go-ing tracks is, of course, just a littleway this side of the tunnel entrance,but the signal bridge is by arrange-ment the track circuits made to act asthe fouling, point, and the signals onthe bridge indicate a clear or a block-ed line from that point. A passengertrain moving along the going trackat the extreme right operates the four•signals governing the going lines— both the home and distant signa
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
