rollability
nounEtymology From roll + -ability.
1
The quality of being rollable.
- Like Tees, Tyne and Healey Mills are semi-automatic in operation, in that the hump operator personally controls the secondary retarders, on which he selects one of six leaving speeds, based on his judgment of a cut's rollability and speed and the degree of siding occupation on its destined route.1963 September, “The new Tyne and Healey Mills yards of the North Eastern”, in Modern Railways, page 164: