The advantage of LIDAR is an accurate distance measurement (to every
point in the sensors view).
Radar as a technology can give distance, but typically the units used in
vehicles give "relative speed" instead, and are used to detect the
distance to other moving vehicles.
Although they can detect fixed obstacles, they typically ignore them, as
they ignore anything that is stationary because they don't have enough
angular resolution to differentiate between the road surface and other
objects on/near the road.
However, if a vehicle ahead of you starts to slow down or speed up, they
can very reliably detect that.
Jay
On 5/27/21 12:23 PM, Peri Hartman via EV wrote:
I can imagine that radar or lidar is only adding redundancy. An object
"illuminated" by either of these from a head-on signal won't have any
shadows or depth, making them mostly blobs. It seems at best, they could
be used in conjunction with cameras, perhaps adding a bit of safety if
the radar or lidar detected an obstruction that the cameras didn't.
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