Amends the Counties Code and the Illinois Municipal Code. Provides that "system of administrative adjudication" means the adjudication of any violation of a municipal or county ordinance, except for any offense under the Illinois Vehicle Code or a similar offense that is not included in specified provisions of the Illinois Vehicle Code (rather than except for any offense under the Illinois Vehicle Code or a similar offense). Amends the Illinois Vehicle Code. Provides that a municipality or county may adopt an ordinance limiting the width of vehicles, the height of vehicles, and the length of vehicles on roadways and to enforce violations of specified provisions of the Code or a similar provision of a local ordinance. Makes conforming changes.