**3. Results**

As described in Section 2.3, raw data for each road was purified after extraction in order to exclude road sections without edge markings as well as parts with road lighting. The final data used in the analysis included 2,649,472 samples and for each sample the quality of the detection and the view range were recorded. The total number of samples per each quality level, line type (middle/edge) and visibility conditions (night-time/daytime) is presented in Table 2.


**Table 2.** Number of analysed samples.

Further analysis is divided into two subsections: Quality of lane markings' detection and view range of lane markings, and presented in the following chapters.
