First releases of Kerbin Highways (+ companion mods Kerbin Services and Kerbin Railways) are now out!

it's a mod that adds UK-style motorways to KSP via KK (you can drive rovers on them)

Currently on spacedock at https://spacedock.info/profile/airbusa380airplane

Should be on CKAN soon (it takes a while for it to sync)

Currently mostly good enough but I know of a few bugs, 5.0.0 (for highways) should be out before midnight (UK time)