"The report provides information concerning the prevention and removal of roadside litter, unfulfilled needs, knowledge gaps, and underperforming activities. It covers enforcement, education, awareness, and engineering methods for both litter prevention and collection. The synthesis focuses on state DOT personnel involved in roadside litter prevention and their contractors who conduct litter prevention and removal programs. Also, as roadside litter prevention appears to be a multiple stakeholder activity, policy makers and practitioners from other government agencies and environmental organizations, as well as groups and volunteers may be interested in this synthesis"--Pref.