In this situation, are you obliged to heighten your attention to the extent that permits you to react quickly enough?

You are approaching a marked pedestrian crossing, which requires you to exercise particular care. The visible warning sign A-16 'pedestrian crossing', together with the supplementary plate T-27 'pedestrian crossing frequently used by children', further emphasizes the need for heightened attention. Exercising particular care consists of increasing your attention to a level that enables a quick reaction to a potential hazard.