This paper summarises the work and findings of the OECD Study Group TT1/TT2 on the worldwide state of the art for road traffic congestion control and demand management. The study aimed to obtain and present information about the wide variety of measures in use to manage congestion and reduce its impact. Its final report shows what conventional and innovative measures are being taken to address increasingly difficult traffic congestion issues. Two types of measures are considered. Demand-side congestion management measures are designed to reduce car demands on the system by: (1) increasing vehicle occupancy and modal share of public transport; and (2) reducing the need to travel during a peak period or to a period or to a given location. Supply-side congestion measures are designed to increase the existing capacity of the system, to improve traffic flow for all modes. Tables are presented to show the impact of these measures on achieving the following objectives: (1) reducing trip need and trip length; (2) promoting non-motorised transport, public transport and carpooling; (3) shifting peak-period travel and travel from congested locations; and (4) reducing traffic delays. The group's 14 recommendations are stated.
Samenvatting