GRIP (Global Roads Inventory Project) - 2018

The Global Roads Inventory Project is a harmonized global dataset of aproximately 60 geospatial datasets on road infrastructure. The resulting dataset covers 222 countries and includes over 21 million km of roads, which is two to three times the total length in the currently best available country-based global roads datasets.
This dataset is split into 5 road types: highways/ primary/ secondary/ tertiary/ local roads
For more information, please visit:
http://www.globio.info/download-grip-dataset
http://iopscience.iop.org/article/10.1088/1748-9326/aabd42/meta