Traffic jams in Belgium

From the Wall Street Journal:  

BRUSSELS—A national advertising campaign is in motion here to make a novel addition to the World Heritage List, a collection of humanity’s greatest cultural treasures that includes the Taj Mahal and the Acropolis.

Unlike those buildings, it moves. Though barely.

The candidate: the Belgian traffic jam. 

The traffic jams in Belgium last a century or more;

whole dynasties rise up and fall as motors rev and roar.

It's like a city built on wheels, as thin as vermicelli;

the drivers open laundromats and a kosher deli.

In the spring the car tops bloom with flowers and green moss,

while those who pass them by in trains yell out "Go get a hoss!"

A young man who drives in to work is stuck in such a mire

that by the time his desk is reached he's ready to retire.

The only thing that's slower than the traffic out of Ghent

is molasses that is frozen and then mixed with raw cement.