I drove on the M6 from Pak Chong to Korat 2 days ago. It finishes at the moment on the ring road around Korat. Easy to go North or East from there. Toll gates are being built now so still free, probably another 6 months or so. All 80 Km/H posted but most traffic at about 110Km/h. Sign saying only 4 wheel vehicles allowed.
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If you're concerned about corruption you're in the wrong place.”
Honestly, I don’t think the issue is about corruption, it is about the legality of one’s extension if properly audited, following this corruption.