In the evening, city traffic becomes visually busier: headlight reflections, shop windows and wet asphalt can blend the background together. A motorcycle is smaller than a car, so its visibility needs deliberate attention.
A clean headlight and visible gear details help the rider be noticed earlier. A predictable lane position matters just as much, especially before junctions, pedestrian crossings and driveways.
If a driver is tired or dividing attention between several movements, a sudden motorcycle maneuver can be noticed too late. A calmer pace gives both the rider and nearby drivers more time.
In practical terms, check the lights before riding, avoid following too closely and choose a line where the motorcycle is not hidden behind larger vehicles.