The risks of warm nights and wet days in the context of climate change: assessing road safety outcomes in Boston, USA and Santo Domingo, Dominican Republic

Table 5 Relative risk (RR) with 95% confidence interval (CI) of traffic collisions resulting in non-fatal injury or property damage on warm-season days with extreme heat or precipitation in Boston, MA

Condition	Non-Fatal Injury	Property Damage
Condition	RR	95% CI	RR	95% CI
Hot Days (T_MAX ≥ 95^thp)	1.09	(0.99, 1.21)	0.96	(0.86, 1.07)
Warm Days (85^thp ≤ T_MAX ≤ 95^thp)	0.98	(0.91, 1.05)	0.94	(0.88, 1.01)
Warm Nights (T_MIN ≤ 95^thp)	0.87	(0.78, 0.98)	0.91	(0.82, 1.01)
Wet Days (> 0 mm)	1.19	(1.13, 1.25)	1.25	(1.19, 1.31)
Very Wet Days (>mean)	1.27	(1.19, 1.34)	1.36	(1.29, 1.43)
Extremely Wet Days (>mean of rainy days)	1.25	(1.16, 1.34)	1.42	(1.33, 1.51)

Bold indicates RRs for which the 95% CI exclude the null (RR = 1.0), and p indicates percentile

ISSN: 2197-1714