Highway
Major highways are often named and numbered by the governments that typically develop and maintain them. Australia's Highway 1 is the longest national highway in the world at over and runs almost the entire way around the continent. China has the world's largest network of highways followed closely by the United States of America. Some highways, like the Pan-American Highway or the European routes, span multiple countries. Some major highway routes include ferry services, such as U.S. Route 10, which crosses Lake Michigan.
Appian Way
Many parts of the original road beyond Rome's environs have been preserved, and some are now used by cars (for example, in the area of Velletri). The road inspires the last movement of Ottorino Respighi's "Pini di Roma". To this day the Via Appia contains the longest stretch of straight road in Europe, totaling .
There are the remains of several Roman bridges along the road, including the Ponte di Tre Ponti, Ponte di Vigna Capoccio, Viadotta di Valle Ariccia, Ponte Alto and Ponte Antico.