670 - İran demiryolu - Vitali

Steepest gradients of Turkish railways


The gradients in railways are important, since they may kill the efficiency.

One of the most critical factors determining the maximum gross weight of a full train is the max gradient all along the route.  This gradient, together with the traction power of loco and the strength of couplings of wagons, determine the maximum gross weight of a train.

As an example, a loco going from Gebze to Eskisehir can run with 2500 gross tonnes on big part of the route, but can only run with 750 tonnes because of the Bilecik-Karakoy section. Thus the loco should run under capacity on other sections of the route.

A solution for this problem is running additional loco on that part. TCDD is using this solution in some critical points. But even this means using one loco and staff very inefficiently most of the time.

Below map shows the top 20 steepest gradients in Turkey killing the total efficiency:

670 - Eğimi en yüksek demiryolu kesimleri

670 - Türkiye demiryolları dik hat kesimleri

Cover Photo: V. ©

Written by Onur Uysal

Railway consultant. Owner of RT Media & Consultancy. Founder and editor of Rail Turkey.

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