An average of 6 000 cars per hour pass through the busiest boulevard of the Bulgarian capital Sofia, the Tsarigradsko Shose Blvd.

This becomes clear from a traffic study carried out by the Sofia Municipality in order to draft a noise map of the capital city.

The 6 000 cars per hour on the Tsarigradsko Shose include about 200 trucks among the other vehicles. Tsarigradsko Shose (meaning "the road to the emperor's city" is part of the ancient route connecting Constantinople with Central Europe. Today, the Tsarigradsko Shose starts from the downtown of the Bulgarian capital and heads south for the city of Plovdiv, and Turkey's largest city Istanbul.

The second busiest boulevard in Sofia is the Bulgarian Blvd with about 4 000 cars per hours, including 120 trucks.

3 700 cars per hour pass through the Vasil Levski Blvd in the downtown, 3 400 - on the General Danail Nikolaev Blvd, and about 3 200 - on the Ivan Ev. Geshov Blvd.

The Patriarch Evtimiy Blvd, Sitnyakovo Blvd, and Princess Maria Luisa Blvd each see about 3 000 cars per hour.

Other busy boulevards - the Botevgradsko Shose, Nikola Vaptsarov, Slivnitsa, Alexander Malinov, Knyaz Al. Dondukov, and Rozhen - each see about 2 500 cars per hour.