The USPS has ~30,000 motor vehicle accidents per year. The entire USPS fleet travels ~1.28B miles / year, with the LLVs traveling 764M miles. The LLVs travel

The USPS has ~30,000 motor vehicle accidents per year. The entire USPS fleet travels ~1.28B miles / year, with the LLVs traveling 764M miles. The LLVs travel about 18 miles per day, 300 days per year, which gives you an estimated 43 million LLV trips per year. Assuming all 30,000 motor vehicle accidents are LLVs, that amounts to 1 accident every 1433 LLV trips. Of course, on each LLV "trip", it delivers letters and parcels to hundreds of addresses; each drone delivery is presumably one. (The USPS also averages 1 accident every ~43,000 miles; this is significantly above the US average of 1 accident per 165,000 miles driven. I would assume the increased rate is (1) USPS vehicles drive slow and stop frequently along their routes; I would guess many accidents are other vehicles driving too fast and trying to pass in unsafe areas (2) distracted driving; drivers are performing other tasks eg retrieving the next addresses mail while driving and (3) every USPS accident is likely reported; drivers are responsible for the condition of their vehicle and small fender-benders that we might not report are likely included in USPS statistics.)