Can i hire a lawyer in my state for an out of state traffic violation?

you need a virginia attorney

Ahhh, Virginia.  You need to be careful in Virgina.  They are known for giving out traffic violations.  You must hire an attorney who is licensed to practice in that state.  In your case this means hiring an attorney licensed to practice in Virginia.  Though many New Jersey attorneys are barred in other states, those states usually include Pennsylvania or New York, not Virgina- though it is possible that you may find one licensed in both.  The problem will be that you will need the attorney to make an appearance on your behalf in Virginia, and even if you were to find an attorney licensed in NJ and VA they are unlikely to take the 6 hour drive.  Furthermore, it is generally in your best interest to find an attorney who is familiar with the jurisdiction.  In NJ each city has a municipal court that hears traffic offenses, and you want to find an attorney who knows their way around that particular courthouse/ judge/ prosecutor.  I hope that helps.  All the best!