1. RAILWAY COMUNICATION: Mr. Mahbubur Rahman Lecturer, Department of Civil Engineering Stamford University Bangladesh 51, Siddeswari, Dhaka. BANGLADESH PERSPECTIVE
32. DERAILS Derails are safety devices designed to limit unauthorized movement of a car or locomotive beyond a specific point. The most frequent use of derails is to prevent unauthorized movement of equipment from a side track onto a main track. Derails are sometimes used to prevent the movement of equipment onto portions of a side track where it might cause an accident or damage. FROGS AND GUARD RAILS Frogs are special pieces of trackwork that enable flanged wheels to cross from one rail onto another rail. Guard rails consist of a rail or series of rails that lay parallel to the running rails of a track
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