Abstract
Measurements of the noise of the central urban motorway in Glasgow are reported for locations near elevated sections and cuttings, along side roads and on a nearby hill. The typical sound level immediately adjoining the motorway is 75 dB(A), L10 (18-hour), which is in close agreement with the predicted value for free flowing traffic noise. The results show that the traffic on the parallel surface roads and the access roads can dominate the sound levels close to the motorway. The results also indicate that the noise is radiated strongly upward and outward from a road in a cutting, and that any shielding is restricted to positions close to the motorway. The problems of reducing the noise exposure, involving the total separation of people and traffic, are discussed and the Glasgow Corporation approach to reduce the noise of future urban motorways is described.
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