*1.2. Contribution*

In this paper, we present a method of spatio-temporal synchronization (offset estimation) of sensors and an appropriate fusion technique to reconstruct microscopic traffic data. The sensors record limited traffic data, which are covered by common detection sensors at fixed cross-sections. Firstly, this results in an enhancement that enables radar and loop detectors to generate area-based microscopic traffic data, even when a precise sensor synchronization is not possible. Secondly, it allows the filling of gaps of data already covering a limited road section, thus reducing the sensor density requirement of computer vision-based systems. The method solves the following problems simultaneously:

