A major thoroughfare, particularly one used to provide a large capacity for travelling some distance.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "arterial road" in a sentence
"a little later Bix came to the northern arterial road from Venev."
"Tombstones and more tombstones — not the imposing mausolea and sepulchra of the rich and noble which flanked every arterial road out of the city, but the gravestones of simpler souls."