Assertion: railroad's line | /r/HasProperty | built as single-track
Facets:
value: with provision for duplication
type: OTHER
value: with earthworks
type: OTHER
value: with structures
type: OTHER
value: for reasons of cost
type: CAUSE
Source sentences:
text: In the earliest days of railways in the United States most lines were built as single-track for reasons of cost, and very inefficient timetable working systems were used to prevent head-on collisions on single lines.
text: The strongest evidence that a line was built as single-track and duplicated at a later date consists of major structures such as bridges and tunnels that are twinned.
text: To reduce initial costs of a line that is certain to see heavy traffic in the future, a line may be built as single-track but with earthworks and structures designed for ready duplication.
text: Some lines are built as single-track with provision for duplication, but the duplication is never carried out.