speed order

noun

noun

a (temporary) speed restriction.

An order to observe

We had a long 20 m.p.h. speed order of perhaps 7 miles' duration some 60 miles from Aulnoye and André told me to get some 8min in hand with our heavy train to offset this. [...] When we had passed the speed order, we were about 4min behind time, but we had regained nearly all the time by Creil.1961 March, ""Balmore"", “Driving and firing modern French steam locomotives”, in Trains Illustrated, page 147:

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