Conservative is a misnomer. Car dependent design drives a lot of US emissions. That design is largely government meddling that they claim to hate:

• Government mandated minimum parking
• Roads paid for via taxes they hate
• Government tracking via vehicle registration
• Government permission needed via licenses
• Government blocking private land owners building what makes sense on their land (e.g. a small general store in the center of a SFH neighborhood)
• Government mandated insurance
• Government mandated vehicle requirements

That is what I can think of in like 2 minutes. Lots of small government there.