Odd how concepts of time vary, depending on who has done what, when and where.
Half past six in the evening isn't what most normal people would refer to as 'at night' and in any case, since when was use of the public highway by those who use it as of right (pedestrians, riders of horses and cycles and horse-drawn vehicles) and not merely by permission or licence, limited to specific periods during each 24 hour period?
Perhaps tin-cans-on-wheels are the things that should be restricted on roads ... especially 'at night' if 'night' includes most normal people's rush hour homewards ... as it seems to for the 'former police officer' quoted above.
Especially as "at night" - in this instance, 3am, is one of the times I will
happily use trunk roads.
With the low amount of traffic, you have good sight lines, and with good lights, you can be seen about a mile away on a big trunk dual carriageway.
Sure, there's less traffic on minor roads, but what traffic there is might be racing around a blind bend... Perhaps the biggest risk is tw@ing yourself with a pothole, though.
Nice direct route, and butter smooth.
Whereas at lunchtime on a Sunday, I avoided that stretch of road: