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With increasing traffic volumes comes increasing traffic noise. Between junctions 5 and 8/9 of the M4, the highway boundary is in close proximity to private property.
The construction of noise barriers within the verge at a suitable height cuts down traffic noise. To enable the design and construction of these barriers the carriageway levels and verge details are required. For carriageway levels conventional survey techniques would require lane closures, which are undesirable and can be expensive The clear cone system avoids discruption to traffic without compromising safety, accuracy and speed.
Observations were taken from the Clear Cone vehicle located on the hardshoulder with relevant traffic management in place. Clear Clone software and the use of non contact EDM in conjunction with an electronic theodolite and laptop computer enabled safe data capture of the carriageway information with no disruption to traffic flow. Observations to a relative target were used in order to survey the verge.
