Digging in at the MSR hexes etc.

[JDR Dragoon]

If you know the enemy is going to have to come down a road due to mud or snow covered ground, why wouldn't you try to hold up the enemy advance with a welcoming committee!

It sounds like a good strategy from my POV.

You can do that equally well from a position beside the road or offset to the side of the road. A position on the road (either dug in or blasted/broken into the tarmac) is immediately obvious and will be subject to fire, possibly even before it gets a chance to open fire itself.