Making self-driving cars safer in the rain and snow

The video discusses the challenges self-driving cars face in adverse weather, such as malfunctioning lidar sensors and cameras. An engineering team proposes a novel solution using Localizing Ground Penetrating Radar (LGPR) to map the terrain beneath roads, improving navigation. Tests show promising results, with minimal deviation in snowy and rainy conditions, potentially advancing autonomous vehicle deployment.

What technology is used to create a map of the ground beneath the road?

In what way could the innovation mentioned in the text help self-driving vehicles?