arterial
adj.relating to the tubes that carry blood away from your heart, or describing a main road that carries a lot of traffic.
adj.relating to the vessels that transport oxygenated blood from the heart to the body; also describes major transport routes within a network.
“The city is improving its arterial roads to reduce traffic.”
“Doctors monitored the patient's arterial blood pressure closely during the complex surgical procedure.”
“The urban planning committee focused on widening arterial thoroughfares to accommodate the projected increase in commuter traffic from the expanding northern suburbs.”
Typically used attributively before a noun; in medical contexts, it specifically refers to the systemic circulation.
“The city said it finished more than 1,000 service requests , and expressways and arterial roads are now clear, with work continuing on local roads.”
“State and territory governments generally manage major arterial and state roads, while local councils maintain most local roads.”
From artery + -al.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.