Quote: "...and at every entrance there’s a sign that says that pedestrians, bicycles, motorized bicycles, horse-drawn vehicles, and other slow-moving traffic is prohibited"
That would be a "limited access" highway then due to the sign. Out in CA they post signs like that on the on-ramps to interstates and freeways (freeways = highways with exits/on-ramps). I have no desire to ride along interstates. I thought I made that clear by saying US and state highways and back roads.