Definition of "unrestricted"

The extreme depth of these channels, and the insistence of the Board of Trade on a headway of 150 ft. for the unrestricted passage of large ships, necessitated a high bridge with two main spans, and a central pier on Inchgarvie.

1950 March, H. A. Vallance, “On Foot Across the Forth Bridge”, in Railway Magazine, page 147

The new fast lines are laid out for unrestricted speed through the station, as after electrification certain expresses may run non-stop between Euston and Birmingham.

1962 June, David Walters, “The new station and layout at Coventry”, in Modern Railways, page 407