HIGHWAY ENGINEERING AND THE INFLUENCE OF GEOMETRIC DESIGN CHARACTERISTICS ON NOISE
Civil engineering aspects of the problems associated with noise and highway planning, design, construction, maintenance and management are reviewed. The establishment of noise "corridors" of different levels are accepted as a critical feature of highway planning. The effect on noise levels of doubling the amount of traffic on a particular route is considered. The cumulative effects of noise from elevated or depressed and ground level roads on the assessment of noise at various heights above ground level, and design principles for minimizing noise reflection and resonance from elevated motorways, the traffic noise levels on ramps, slip roads and gradients, and the effect of different road surfaces, are some aspects which need to be studied. A comprehensive factual survey of 600 properties (and 200 sites) of the effects of landscape treatment, highway alignment and traffic noise on property, indicated that the depressed or subsurface highway is potentially the greatest single reducer of noise level. Tree plantings affect noise only slightly when compared with the benefits obtained by elevating or depressing a highway. Tall apartment buildings, truck noise and the presence of limited access highways are also discussed. A general equation was computed by multiple regression to indicate the probable combined effects of distance, alignment and vegetation on the level of noise from road traffic. The median values are presented from a study of the effects of a road gradient of 5 percent (up-grade) on the noise which is generated by heavy trucks. The effects on noise of the speeds of the vehicles (passenger cars) were studied in a series of controlled tests and field observations. Equations are presented for noise levels for different types of road surfaces. These relationships indicate the desirability of minimum roughness of the wearing surfaces of road pavements to reduce noise levels. The noise criteria for the design of all purpose routes are discussed. The results of a London Noise Survey are reviewed.
Southampton University, EnglandDepartment of Civil Engineering
Southampton S09 5NH, Hampshire, England
- WILLIAMS, TEH
- Publication Date: 1969-3
- Features: Appendices;
- Pagination: 6 p.
- TRT Terms: Alignment; Depressed highways; Environmental impacts; Equations; Geometric design; Highway bridges; Highway design; Highway engineering; Highway grades; Inert gas shielded arc welding; Landscape design; Multistory structures; Noise control; Pavements; Plants; Ramps; Slopes; Surface course (Pavements); Surveys; Texture; Traffic noise; Trucks
- Old TRIS Terms: Inert gas welding
- Subject Areas: Environment; Highways; Motor Carriers; Pavements; Safety and Human Factors;
- Accession Number: 00260817
- Record Type: Publication
- Report/Paper Numbers: Theme 3
- Files: TRIS
- Created Date: Nov 27 1974 12:00AM