The details of proposals for the future of Interstate 81 include tolls and increased fines for passenger vehicles, according to this article. Among the growth-control measures rejected so far in this session of the General Assembly was a proposal by a Northern Virginia legislator that big-box retailers such as Wal-Mart would be required to pay impact fees to solve some of the traffic problems they create, according to this report. Last week, a group of anti-Wal-Mart activists held a press event to exhibit their petition against the location of a new Wal-Mart in Abingdon at Interstate 81's Exit 14, as reported here.