Researched, developed and patented by Longdin & Browning. Known as Vangarde in USA. Enables a high precision survey of a highway surface which the Clear Cone vehicle can complete while positioned on a highway hard shoulder, eliminating the need for lane closures

• Safety - Reduces survey personnel exposure, and eliminates the 65% increase in road accidents encountered at lane closures.


• Cost Effective - As a need for traffic management is reduced. Further costs associated with traffic delays are also reduced.


• Accuracy - Tested and approved by the UK Transport and Road Research Laboratory and Departments of Transport in Europe and the USA. The System consistently produces pavement levels to better than +/-5mm.