guide rail

noun — 2 senses

guide rail

noun

1

Synonym of guardrail.

2

Synonym of check rail.

There are 11 tunnels on the branch. The longest is 350 metres. There's an additional guide rail on the sharper bends.2023 November 29, Paul Clifton, “West is best in the Highlands”, in RAIL, number 997, page 44:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.