Size can be deceptive (pic from Google).
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The morning after our tunnel adventure we were talking to an ol' timer at the BP in South Grafton. He told us that he use to drive a loaded timber jniker through it in the old days - must've been smaller that today's jinkers.
Which brings me to Today's Trivia Question .....
What is the connection between some of the Space Shuttle components and Roman chariots?
Agree...that tunnel actually looks way smaller from the western end than from the "Google-end"...there's also no road-widening on the western end and the rockface of the entrance is overhanging to a point, so it
all "narrows down" from that angle. Yeah, the old jinkers were some old cab-over Bedfords, Acco's etc. shorties, , nothing like today's rigs.