From what they told us at the museum, the other advantage of the Lartigue system is that, like camels, sand is not a problem.
Conventional railways have the unfortunate tendency to bury themselves in blown sand and apparently this is less of an issue with the mono/tri rail Lartigue system
The other thing that I picked up was that Lartigue was petitioning parliament to approve his design, and Listowel & Ballynunion were petitioning parliament for an act to enable a railway, my cynical mind thought that perhaps a mandarin in Whitehall saw an easy answer to get both of these petitioners off his desk in a single stroke of the pen…