TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 394: Reducing Liter on Roadsides explores the state of the practice in reducing roadside litter as it involves state departments of transportation (DOTs). 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. This report is located at https://www.trb.org/news/blurb_detail.asp?id=10562