Working limits
Working limits means a segment of track with definite boundaries established in accordance with this part upon which trains and engines may move only as authorized by the roadway worker having control over that defined segment of track. Working limits may be established through exclusive track occupancy, inaccessible track, foul time or train coordination as defined herein.
Source
49 CFR § 214.7
Scoping language
Unless otherwise provided, as used in this part