The relative risk of nearside accidents is high for the youngest and oldest pedestrians

► Relative risk of injury in the first half of road crossing is exposure-neutral. ► RRNF peaks between 10 and 14 years and then declines until late old age. ► However, RRNF is lower for under 10 s and higher for over 85 s. ► These extreme patterns are best explained by an attention failure account.