Samenvatting
This report reviews the areas in which research activities have taken place in the United Kingdom: (1) design and drafting of projects, (2) environment problems, (3) safety (4) geometric standards, (5) level of service, and (6) equipment and operation- signalling enhancements on heavily used motorways can sometimes be justified by savings in accidents. Automatic detection of queues and slow moving vehicles is being installed. Television surveillance can also be a useful tool. A code of practice to standardise levels of maintenance throughout the country on motorways and all- purpose roads has been introduced. Lane rental has been successfully introduced to reduce traffic delays at major roadworks. Safety at roadworks has been studied.