You can feature this music here on Newgrounds for your own creations. Outside of Newgrounds, the best is to use one of the links below, to get a license, if you are planning to use this music for commercial use.

Creative Commons:

Bandcamp - voytekpavlik.bandcamp.com/track/into-the-highway

Royalty Free:

AudioMicro - https://www.audiomicro.com/into-the-highway-royalty-free-stock-music-1340461

This track is also available for non commercial use:

Soundcloud - https://soundcloud.com/voytekpavlik/into-the-highway-voytek-pavlik

More about Voytek Pavlik:

Facebook: www.facebook.com/voytek.pavlik.music
YouTube: www.youtube.com/user/VoytekPavlik
Twitter: www.twitter.com/voytekpavlik
Instagram - https://www.instagram.com/voytekpavlik/
Vimeo - https://vimeo.com/voytekpavlik

Have fun!