Some rural areas seem in a race to enact ever lower speed limits on dirt / gravel unpaved roads. I've driven many miles on boring dirt roads posted at 35 to ge

Some rural areas seem in a race to enact ever lower speed limits on dirt / gravel unpaved roads. I've driven many miles on boring dirt roads posted at 35 to get to hiking trails. Different states define unposted dirt roads as 55, 45, and 35, making this very exciting for travelers. Would not be surprised at all to see 25 posted or even 15 MPH for either safety or revenue enhancement. When things are dusty and I'm almost but not entirely lost, but in no hurry, 15 is plenty fast and cruise control might be nice.