signalless

English

Etymology

From signal +‎ -less.

Adjective

signalless (not comparable)

1. Without any signals.
   • 1950 July, J. C. Mertens, “By the "Taurus Express" to Baghdad”, in Railway Magazine, page 439:

     At 6 p.m. the train left and ran quickly across the north-east corner of Syria, with few stops on this isolated 40-mile stretch of signalless railway.