Laser safety ratings are based on what would happen if the laser was pointed directly at your eye continuously. In the case of general traffic each lidar is scanning in different direction and while manufacturers try to make the energy produced by their lasers instantaneously brighter than the sun in one specific wavelength but damage to your retina is caused by excessive heating and doesn't care about what wavelength the energy is coming in at in the IR except to the extend that it can get to the retina or not. In your morning commute I'd worry less about the lidars than the much larger amount of invisible IR radiation given off by the sun. And I'd worry much less about the sun's IR radiation than the sun's UV radiation, wearing sunglasses during a 2 hour commute is best for your eyes.