
Quoting
free9man
If you let it go, there will be a warrant for your arrest. Anytime you are pulled over for a traffic violation, you will be handcuffed and taken to jail until the issuing court says whether they want to extradite you. If they don't, you are released and the warrant is still active. Next time you are pulled over/interact with police that requires they run your name...the process will be repeated.
There is a good chance that you would not be able to renew your license until you clear it up.
You can leave the country and maybe you can come back without problem, maybe not. Now if you're just talking about running south of the border, the chances of problems are slightly smaller.
The warrant stays until you deal with the charge or it is quashed for some reason.