Monocock
As an aircraft moves through the air it propagates a pressure wave outward in all directions. This pressure wave moves away from the aircraft at the speed of sound and if you are standing beneath the aircraft it is this wave passing over you that enables you to hear the aircraft. As the aircraft approaches the speed of sound the wave makes less progress forward relative to the movement of the aircraft and the waves begin to coalesce. At the speed of sound the waves make no forward progress and all lump together in a shockwave. In reality they make a little progress forwards as the lumping together increases the local air temperature and the speed of sound gets faster with increasing temperature but this is negligible for your interests. This is what causes the “sonic boom”. And also why you get less warning of the approach of a high speed aircraft passing over you at low level. Applying the same principle to light I would be reasonably confident in suggesting that at the speed of light the light from your headlights will make no forward progress, and that your path would not be illuminated (that said I am no physicist).
If you posted this on tech log you would probably attract the interest of some serious propeller heads (and get lots of answers that you might not understand). But might get more of a take up than it does here.