Table 1.

The content of smart road classification.

Type of Road Segments	Content
Human-way (HU)	Do not support automation.
Assisted-way (AS)	Present partial support for automation, with remarkably fewer disengagements than on HU road segments.
Automated-way (AT)	Present similar physical characteristics to AS road segments, but also present connectivity capabilities that could help connected vehicles prevent and avoid disengagements.
Full Automated-way (FA)	Present full support for SAE level 4 vehicles and good connectivity capabilities.
Autonomous-way (AU)	Present full support for SAE level 4 vehicles and exceptional connectivity capabilities. They can only be used by SAE level 4 and 5 vehicles.