"The Wokka driver I spoke to many years ago described it as IFR3 (I Follow Roads, Rivers and Railways), so they're keeping all their options open".
Not just Wokka drivers, we had a USMC Pilot on exchange in 899 a few years ago, "Major Mac". When asked after a night flight where he'd been he said he followed the A303 East, until he got towards W London, ATC got "p!55ed" with him so he headed south until he found the coast. Came west along the coast until he recognised Portland Bill and then flew North to get back to VL.