"in bustling" is correct and usable in written English.
You can use it to describe a busy urban area. For example, "The streets of downtown Tokyo are always in bustling motion."
In bustling Germany mainstream parties dominate; in anaemic France support for the National Front is blooming.
In bustling multicultural cities such as London and Birmingham, that figure rises to 40%.
The vast stores were put outside cities in bustling new suburbs.
The pair met sometime around 1888, somewhere in bustling New York.
I'm a music critic, so for me it's something else too: an immersion in bustling, jumbled, enveloping sound.
In bustling Hong Kong, however, many wondered why they shouldered so much of the cost with so few tangible benefits.
One day, we boarded a Broads Tours Company double-decker riverboat in bustling Wroxham on the Bure.
I went on to become a midwife in more clinical, acute hospital settings in bustling towns and larger cities.
Options are somewhat limited, but Oolongs Tea Bar is a tiny island of tranquillity in bustling downtown New Haven.
There's more to do in bustling Lake George than listen to the roar of Shelving Rock Falls.
It also fed the ever-growing thirst for interior illumination in bustling commercial cities, which in turn engendered culturally specific modes of visual perception and expression.
