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Double trap points are a full turnout, leading to two tongues. Usually the tongue nearer the main line is longer than the other. Trap points with a crossing are double trap points where the tongues of rail are longer, so that the trap point rail nearest the main line continues over the siding rail with a common crossing or frog.
A right-hand railroad switch with point indicator pointing to right Animated diagram of a right-hand railroad switch. Rail track A divides into two: track B (the straight track) and track C (the diverging track); note that the green line represents direction of travel only, the black lines represent fixed portions of track, and the red lines depict the moving components.
The second type of derail is the "split rail" type. [7] These are basically a complete or partial railroad switch which directs the errant rolling stock away from the main line. This form is common throughout the UK, where it is called trap points or catch points. Split rail type derail on the A&M in Rogers, Arkansas
The group of rail vehicles making up a train, or more commonly a group of locomotives connected together for multiple-unit (MU) operation [76] [77] Control point (CP) (US) An interlocking, or the location of a track signal or other marker with which dispatchers can specify when controlling trains [65] Cornfield meet (US)
A railway junction that has a track configuration in which merging or crossing railroad lines provide track connections with each other without requiring trains to cross in front of opposing traffic on the same level [90] Fouling point A point of a switch turnout where a car or locomotive on one track obstructs movements on the adjacent track.
An insulated track circuit interrupter fitted to trap points. A track circuit interrupter may be fitted at catch points, trap points or buffer stops to maintain a track circuit in the 'occupied' state in the event of a derailment. The track circuit remains de-energised until the interrupter is replaced.
The goods siding on a double line (in the above diagram) uses two trailing points and a diamond. It can be shunted by trains in either direction. This was widely done in New South Wales, though later on the diamond crossing was replaced with a pair of ladder crossovers; such as: Bredalabane (S) Jerrawa (S) Woy Woy (N) Newbridge (W)
This also eliminates the problem of switch/point failures. In a frog gauntlet, one rail crosses over a rail on the adjacent track. A frog is used to provide the flangeway for the crossing tracks. The train taking the gauntlet runs over the frog onto the parallel rails, passes through the gauntlet area, and passes over another frog to return to ...