main-line locomotive

main-line locomotive

[′mān ‚līn ‚lō·kə′mōd·iv]
(mining engineering)
A large, high-powered locomotive which hauls trains of cars over the main haulage system.
References in periodicals archive ?
In freight transport, automatic driving is being tested using a main-line locomotive in Wildenrath, and the necessary camera and control systems are being tested during shunting operations.
It has signed a cooperation contract with Siemens to upgrade its existing class 152 electric main-line locomotives and thus transform them into what DB Cargo calls "TechLOKs".
The engines, which are replicas of big main-line locomotives, make you think you are traveling in Lilliput.