1. having no roads; lacking roads or vehicular access
Usage: often used to describe wilderness areas or remote regions

Examples

• The roadless wilderness area can only be reached on foot.
• Congress designated millions of acres as roadless forest land.
• The roadless region remained pristine and undeveloped.
• Hikers must traverse roadless terrain to reach the summit.
• Environmental groups fought to protect roadless areas from development.
• The roadless backcountry offers solitude for experienced campers.