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    MIT helps self-driving cars navigate in bad weather conditions

    An MIT team has developed a way for self-driving cars to navigate through bad weather conditions with the help of Ground Penetrating Radar, which helps map what's beneath the road. Autonomous vehicles can use this map to determine where they are.

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    Self-driving technology has come a long way, but it can still be tripped up by bad weather. A team from MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) may have a solution. They’ve developed a way to help autonomous vehicles “see” by mapping what’s beneath the road using Ground Penetrating Radar (GPR).

    Most autonomous vehicles use LIDAR sensors and/or cameras to figure out where they are on the road, but cameras can be thrown off by lighting conditions or snow-covered signs and lane markings, and LIDAR often becomes less accurate in inclement weather. GPR, on the other hand, sends electromagnetic pulses into the ground to measure the specific combination of soil, rocks and roots. That data is turned into a map for self-driving vehicles.

    The system, which uses a type of GPR called Localizing Ground Penetrating Radar developed at the MIT Lincoln Laboratory, offers a few benefits. For starters, it doesn’t matter if the road is snow-covered or if visibility is blocked by fog. And conditions under the road tend to change less often than features like lane striping and signage.

    “If you or I grabbed a shovel and dug it into the ground, all we’re going to see is a bunch of dirt,” says CSAIL PhD student Teddy Ort. “But LGPR can quantify the specific elements there and compare that to the map it’s already created, so that it knows exactly where it is, without needing cameras or lasers.”

    Self-driving technology has come a long way, but it can still be tripped up by bad weather. A team from MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) may have a solution. They’ve developed a way to help autonomous vehicles “see” by mapping what’s beneath the road using Ground Penetrating Radar (GPR).

    Most autonomous vehicles use LIDAR sensors and/or cameras to figure out where they are on the road, but cameras can be thrown off by lighting conditions or snow-covered signs and lane markings, and LIDAR often becomes less accurate in inclement weather. GPR, on the other hand, sends electromagnetic pulses into the ground to measure the specific combination of soil, rocks and roots. That data is turned into a map for self-driving vehicles.

    The system, which uses a type of GPR called Localizing Ground Penetrating Radar developed at the MIT Lincoln Laboratory, offers a few benefits. For starters, it doesn’t matter if the road is snow-covered or if visibility is blocked by fog. And conditions under the road tend to change less often than features like lane striping and signage.

    “If you or I grabbed a shovel and dug it into the ground, all we’re going to see is a bunch of dirt,” says CSAIL PhD student Teddy Ort. “But LGPR can quantify the specific elements there and compare that to the map it’s already created, so that it knows exactly where it is, without needing cameras or lasers.”

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