In contrast to Glasgow, where the gauge allowed railway wagons to be hauled (by steam locomotives) along streets near the shipyards.
From the National Transport Trust website:
Glasgow's tramlines had a highly unusual track gauge of 1,416 mm (4 feet 7¾ in), allowing 1,435 mm (4 feet 8 1/2 in) standard gauge railway wagons to operate over parts of the tram system (notably in the Govan area) using their wheel flanges running in the slots of the tram tracks.
The USSR was for many years the world's greatest user of trolleybuses, but AIUI the system in Moscow closed some years ago. Many other cities in what was the USSR still use them.
Given the sheer size of the system in Moscow, however, and in other places, the use of trolley lorries seems sensible.
Perhaps this tangent should now carefully reverse into the depot...a most undignified and awkward manoeuvre for a trolleybus...
Before it does, having followed that link,
"It passes through the Crimean Mountains across the Angarskyi Pass, reaching 752 metres (2,500 ft) at the highest point, then descends to the resort town of Alushta on the coast."
I can't help wondering if that is the biggest altitudinal pitch that any trolleybus system in the world has ever had.
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From the National Transport Trust website:
Glasgow's tramlines had a highly unusual track gauge of 1,416 mm (4 feet 7¾ in), allowing 1,435 mm (4 feet 8 1/2 in) standard gauge railway wagons to operate over parts of the tram system (notably in the Govan area) using their wheel flanges running in the slots of the tram tracks.
Quite a climb, though the trolleybus system in Mexico City (7000+ feet above sea level) might be the highest in the world.