An arterial highway is a significant roadway that connects multiple cities and communities within a region. It is typically a multi-lane road designed to accommodate high volumes of traffic and speedy travel. Some synonyms for arterial highway include expressway, freeway, highway, interstate, main road, motorway, parkway, and thoroughfare. These terms are often used interchangeably to refer to major roads and routes that facilitate long-distance travel and interstate commerce. Whether you are planning a road trip or commuting to work, knowing these synonyms for arterial highways can help you navigate your way to your destination with ease and efficiency.