The uneven surface is more visible as compared to the mirror-smooth top surface road because while driving on roads with an uneven surface there are different shaped stones present on the top of the road. which work as an object that reflect the light coming from the car's headlight towards the retina of the driver. But while on the other hand, the smooth top mirrored surface layer of the road reflects light in the opposite direction of the driver, in this case, the exact details of the road are unseen, which can cause an accident.
Due to rain on a rainy night, the roadway would reflect light from cars coming in the opposite direction. As a result, it would be difficult to see the roadway.