In the last years an ever increasing use of remote measurements technologies could be seen for the construction of underground infrastructures. 

These technologies are in quite many cases innovative and offer new ways and means to cover monitoring needs in the different phases of such projects. However the novelty of the technologies also may be seen as an obstacle to apply the technologies in the most performing manner and to combine them efficiently with more current technologies

This guideline should thus describe the new technologies, describe their technical features and give recommendations and examples of tender specifications of remote measuring systems for today monitoring projects. Some case studies also show how these technologies have been applied successfully already for monitoring purposes in underground infrastructure construction. 

The guideline has been written to assist tunnel designers, contractors and owners in understanding the benefits and limitations of the today used technology for monitoring with remote measurements systems. The guideline will cover three technologies: Satellite radar interferometry, laser scanning and reflectorless measurements with total stations. These three Technologies has been chosen by the Activity Group as the once which are the biggest interest of the industry.