It took a while for the penny to drop that with roads labelled V4, V5, V6 etc heading roughly north and roads labelled H2, H3 etc heading roughly east, the road grid was set up like Cartesian axes with horizontal and vertical. There's a big article about it all here. Whilst it is good to have such fast roads with no interruption, I found this very rational scientific system harder than expected to navigate because so much seems the same that we lost our bearings at times. We did find the concrete cows though!
