It's mentioned [here](https://www.glasgows-motorways.org.uk/highway-plan/4578281639) under "Radial Motorways". If you look at the [original drawing](https://www.glasgows-motorways.org.uk/communities/9/004/012/033/649//images/4623023712.jpg) you quickly realise just how insane (and great) the original plan was before budget cuts and reality gutted it. |