rileyrob wrote: ↑Thu Jul 21, 2022 09:48
I have also just spotted that
M9 J5 and J6 were originally paired, J5 only having south facing slips, and J6 only north, as indeed is still the case. Presumably the two extra slips were added for J5 when the A905 route to the east was completed to provide better access to the Grangemouth refinery site?
I suspect that the missing slip roads were built in 1986 or 87, and also that M9 J5 has been known by three different names.
I see the Wiki calls it Cadgers Brae Roundabout, a name I don't recall seeing before. I was under the impression it was called Inchyra, but the Wiki uses Inchyra Roundabout for the flat A904/B9143 roundabout 2km to the NNE.
(There is another flat roundabout between the two, at the A905/B9143 junction. The Wiki has pages for several roundabouts in the area, but I'm not sure whether it has a page or a name for that one.)
A few decades ago I used to visit the public and university libraries and take notes about road schemes from any sources I could find there. The magazine
Surveyor had a special annual issue in which local authorities listed their forward programmes. In 1983 this was on 12 May, and the then Central Regional Council cited two new slip roads at Inchyra. The name meant nothing to me at the time and I only later discovered that it referred to a junction on the M9.
However it appears they had still not been built in 1986, as in the Official Journal of the EEC for 23.4.86 Central RC began the process of inviting tenders for new slip roads on the M9 at Grangemouth. This was further reported in Construction News for 1 May 1986 which said it referred to Beancross Junction, which appears to be a third name for M9 J5.
