Upside down, boy you turn me
Inside out, and round and round

Calais is way more up than Lille and Valenciennes, so I didn't count it in the "in-between" And yes I can understand for the 1:19 scale, that's definitely a problem, but IRL there is 230 km between Lille and Paris, so maybe there could be a space for at least one little city I think But I ...

I wish there was more cities in the North of France too, because currently between Lille-Valenciennes and Paris there is nothing whereas in real life there are Amiens (132k hab, 3 times more than Valenciennes) and a handful of cities the same size as Valenciennes, and there are no mod to counter tha...

It may be possible though? As they did it in Project Japan (and maybe in JRR too I didn't checked the toll placement)

Even though it would mean a bit of work, that's maybe the reason too