Table 2.

Piecewise hierarchical linear regression coefficients for three time periods, with standard errors, and p-values for effect of time (year) on pedestrian and bicyclist crash rates by age group; 26 states, 2000-2014.

Years	Ages	Pedestrians in motor vehicle crashes				Pedalcyclists in motor vehicle crashes
		Intercept	Beta(Year)	SE	p-value	Intercept	Beta(Year)	SE	p-value
2000-2004	1-4	18.6	−0.7	0.3	0.011
	5-19	51.7	−2.2	0.4	<0.001	44.9	−2.5	0.6	<0.001
	20-24	44.3	−0.3	0.4	0.436	23.7	−0.5	0.4	0.235
	25-64	30.9	−0.5	0.2	0.056	12.9	−0.1	0.1	0.44
	65+	23.0	−0.5	0.2	0.021	3.4	0.0	0.1	0.728
2005-2009	1-4	14.7	−0.6	0.2	0.002
	5-19	42.7	−1.6	0.3	<0.001	33.4	−1.5	0.2	<0.001
	20-24	45.4	0.5	0.3	0.178	26.7	1.5	0.5	0.012
	25-64	29.9	−0.1	0.1	0.3	13.5	0.3	0.1	0.013
	65+	21.2	−0.3	0.1	0.041	3.6	0.2	0.1	0.146
2010-2014	1-4	13.0	−0.8	0.2	<0.001
	5-19	38.2	−1.8	0.4	<0.001	26.6	−1.1	0.3	<0.001
	20-24	51.2	0.2	0.4	0.612	30.4	−0.1	0.4	0.747
	25-64	32.7	0.5	0.2	0.014	15.5	0.2	0.2	0.174
	65+	22.9	0.3	0.2	0.194	4.5	0.2	0.1	0.012

There were significant declines in all categories of injuries for school-age pedestrians and bicyclists over the time period 2000-2014 (Table 3). Parallel declines were observed i on weekdays and weekends (Table 3). In the beginning of the 15 year period, rates of afternoon school-age pedestrian crashes were approximately 50% higher than morning travel hour crash rates. By the end of the time period, afternoon crash rates declined to the same level as morning travel hour pedestrian crash rates; both trends were statistically significant. The same patterns were observed for school-age bicyclists.