xperimental studies have shown a decrease in driving performance at high temperatures. The epidemiological evidence for the relationship between heat and motor vehicle crashes is not consistent.

Original Source

Experimental studies have shown a decrease in driving performance at high temperatures. The epidemiological evidence on the relationship between heat and motor vehicle crashes is not consistent. The objective of the study was to estimate the impact of high ambient temperatures on the daily number of motor vehicle crashes and, in particular, on crashes involving driver performance factors (namely distractions, driver error, fatigue or sleepiness).