General:
* Cacophony: This emphasizes the chaotic and discordant nature of the sound.
* Roar: A powerful, intense sound, suggesting a continuous stream of vehicles.
* Rumble: A deep, vibrating sound, often used to describe heavy traffic.
* Din: A loud, confused noise, highlighting the overwhelming nature of traffic.
* Hullabaloo: A boisterous, noisy commotion, conveying a lively, almost festive feel.
Specific:
* Honking: The sharp, piercing sound of car horns.
* Screeching: The high-pitched, grating sound of brakes.
* Thumping: The heavy, repetitive sound of car engines.
* Sputtering: The irregular, jerky sound of a car engine struggling.
* Whizzing: The fast, high-pitched sound of cars passing by.
* Blasting: The loud, intense sound of car stereos.
* Rattling: The repetitive, jarring sound of loose parts in a car.
* Clicking: The repetitive, sharp sound of a car's turn signal.
* Grinding: The harsh, scraping sound of tires on asphalt.
Descriptive:
* Constant: The never-ending flow of sound.
* Unrelenting: The persistent and intrusive nature of the noise.
* Overwhelming: The feeling of being submerged by the sound.
* Stressful: The negative impact of the noise on your mental state.
* Energetic: The lively and vibrant nature of the sound in a city.
* Exhausting: The draining effect of the constant noise.
The best words to use will depend on the specific context and the overall tone you want to create.