Traffic noise is considered as disturbance, and possibly one of the most troublesome noises to avoid.
No one living in cities and their suburbs can feel free even in parks or local forests: noise is everywhere (and Moscow is one of the highly noise-polluted cities in the world).
One way of reducing annoyances of traffic noise is to build noise barriers, but there is another method, more environmentally friendly – to mask it with constant or slowly variable full spectrum sounds, such as rain, stream clattering, wind, or even pink or white noise with adaptive volume and tone adjustments.