Manholes and Storm Drains
Pavements often contain non-pavement features such as manhole covers, storm drains and other metalwork that can result in false crack detection if not properly handled.
PavemetricsTM Laser Crack Measurement System (LCMSTM-2) Manhole detection module solves this problem by automatically detecting such features. The detection module can detect two of the most common features including circular manhole covers (both solid and draining) as well as rectangular storm drains.
By detecting these features they can be eliminated prior to the crack detection stage in order to prevent the detection of cracking at their boundaries and on their surfaces. Doing so can significantly improve cracking accuracy.
As an added benefit the Manhole module can also provide a feature inventory including location, type and dimensions.
PP68; Can collect images of pavement surfaces