. "National Highway" . "National Route" . "highways" . "Thai highway network" . . . "highway in Thailand" . "Thai highway network" . "Highway 11" . "highway 12" . "Road" . . "national highway" . "Highway 117" . . "Route 12" . "the national highways" . "numeral 2" . "Highway 12" . "Thai highway 221" . "Thai highway" .