A sample of plots using the IVBSS data similar to Figure 4 showed agreement with these reported ranges.
The vehicles in the IVBSS database had small lateral departure distances and low lateral velocities.
To help visualize the large dataset generated in the IVBSS Naturalistic Driving Study, scatter density plots were used to show areas of high frequency in the lateral velocity - DTLB distributions .
The following section displays the results of applying this approach to the IVBSS dataset.
Figure 5 shows the cumulative frequency distribution of vehicle speed recorded throughout all time points in the subset of IVBSS Naturalistic Driving Study data.
However, the IVBSS data does not show lateral departure distance varies in the same way with lane width.