Permissible Locomotive Speeds

by S Krishnamorthy

The speed information here is taken from Southern Railway documentation, 2001.

Class MPS*
Mechanical limit
MPS* -- Operational Remarks
Passenger Trains Mixed and Goods Trains
(Vaccum braked)
BROAD GAUGE
Electric Maximum speed of goods trains with wagons having shoe ended bearing springs limited to 50 km/h.

Maximum speed of mixed and goods trains - 75 km/h subject to load permitting.
WAM-4P
WAM 4
110 110 / 105 75 (WAM-4)
WAG-5A 100 - 75
WAG-5HA 75 - 75
WAP-1 110 110 / 105 -
WAP-4 110 110 / 105 -
Diesel
WDM-2 110 110 / 105 75
WDM-2C 120 110 75
WDS-4/4B 65 65 65
WDS-6 65 65 65
WDM-7 80 80 -
WDG-2 100 75 75
WDG-4 65 65 65
WDS-4D 60 60 60
WDP-2 105 105 -
METER GAUGE
Diesel Maximum speed of goods trains with wagons having shoe ended bearing springs limited to 32 km/h.

Maximum speed of goods trains with wagons having rigid wheel base of 10' - 0' should not be permitted to be attached to passenger trains.

However, when coaching stock are attached to mixed or goods trains, the maximum speed of such trains should be limited to 40 km/h.
YDM-4/4A 100 75 50
YDM-2 75 60 50
Electric
YAM-1 75 75 40

* MPS stands for Maximum Permissible Speed