evidence: - In 2020, 4,998 large trucks and buses were involved in fatal crashes, a 5-percent decrease from 2019. From 2019 to 2020, large truck and bus fatalities per 100 million vehicle miles traveled by all motor vehicles increased from 0.162 to 0.177, 14 percent below the 21st-century peak of 0.205 in 2000. [...] - "Collision with vehicle in transport" was recorded as the most harmful event for 73 percent of the large trucks involved in fatal crashes and for 75 percent of the large trucks involved in nonfatal crashes. [...] - Of the 4,778 drivers of large trucks involved in fatal crashes in 2020, 312 (7 percent) were 25 years of age or younger, and 294 (6 percent) were 66 years of age or older. In comparison, 2 (1 percent) of the 155 drivers of buses in fatal crashes were 25 years of age or younger, and 20 (13 percent) were 66 years of age or older.