Why not make them super heavy? If they're meant for static grids and don't move I don't think weight should be too much of a problem. I'm sure someone (Me, probably) would want to use them for moveable bridges or carrier runways though, so maybe a second, less durable lightweight version?

Now there's an idea.

Only issue I can think of is that kinda makes them the ultimate projectile... At least if mass is a part of the damage calculations, which may only be a think with Kinetic Devastation I'm actually not sure.

I'm not sure myself, but I can foresee them being welded up and simply dropped from orbit onto a target as really large kinetic kill vehicles...

I'm not entirely sure how these things work and if it's even possible, but what about making them like wheels? They take little to no collision damage, but are still destroyed by weapons fire and explosives, so maybe make the road segments like that, somehow? I can see people using them as ramming protection though.

Can you make the block fall apart if it's not static? That's a real simple solution; station only.

rod

I agree with Jimmio92 on this one.

Long roads need more attachment points like the sides and bottom, without decimating the terrain you cant place slopes.

this pack needs a 1x1x4 piece to really hone in the length so you can keep it tight to the terrain and clean trasition from voxel to the block/road